An illusory promise is one that looks like a commitment but gives the promisor complete discretion to perform or not perform. Because the promisor can choose to do nothing, there is no real obligation and no consideration exchanged in return for that promise. In contract formation, consideration requires a bargained-for exchange, so a promise that the promisor may simply abandon at will cannot create a binding contract. The description that fits this concept is a promise that gives the promisor discretion to perform or not and lacks consideration. It captures why the promise isn’t enforceable as a contract: there’s no obligation on the promisor and no true bargain for the other party. The other options describe promises that would bind the promisor or involve valid consideration, which would create enforceable duties instead of an illusory one.

The main idea is that anti-assignment clauses control who can hold the rights under a contract, and they are typically enforceable, meaning you can’t freely transfer those rights without consent. But transferring rights—the assignment—does not automatically discharge the party who owes duties. The obligor remains liable to perform as promised unless there is a substitution of parties through a novation or a clear release. In other words, you can transfer the benefit of the contract, but you don’t automatically wipe out the original party’s obligations; only a novation—which replaces the obligor with the new party and releases the original obligor—will relieve them of duties.

The key idea is that the implied warranty of merchantability automatically arises when the seller is a merchant who deals in goods of the kind sold. It promises the goods are fit for their ordinary purpose and meet the expectations of someone buying such goods, not defective in a way that would render them unusable. Disclaiming that warranty is allowed, but with limits. A disclaimer must clearly state that the warranty of merchantability does not apply and must be presented in a way that is conspicuous. If the disclaimer is in writing, it must be conspicuous; and it must use the term “merchantability” to be effective. Oral disclaimers can be used, but they should include the term “merchantability” to satisfy the requirement that the disclaimer clearly communicates the exclusion. So this correctly captures that the warranty is automatic when the seller is a merchant, and that the disclaimer can be oral, provided it uses the term and is conspicuous when written.

When a contract is breached, damages aim to put the non-breaching party back where they would have been if the contract had been performed. This includes expectation damages (the value of the promised performance), reliance damages (reimburse expenditures made in reliance on the contract), incidental damages (extra costs incurred because of dealing with the breach), and sometimes consequential damages (foreseeable indirect losses). The costs for materials to finish the mosaic and the parking permit were incurred specifically to perform the contract. Those are classic reliance-type expenditures tied to carrying out the deal, and they would often be recoverable as part of reliance damages or included in expectation damages if they reflect the contract’s value. In contrast, painter’s paintbrushes are ordinary, general-use tools not unique to this contract; reliance damages cover expenditures made in reliance on the contract that would be wasted by a breach, but the cost of such general equipment isn’t recoverable because those tools are likely to be useful in other projects as well. So the paintbrushes’ cost is the least likely to be recovered.