SALT I was a Cold War effort to slow the nuclear arms race by putting ceilings on certain strategic weapons rather than eliminating them or building a defensive shield. It was negotiated by the United States and the Soviet Union and signed in 1972, and it produced two main elements: the Anti-Ballistic Missile (ABM) Treaty, which limited defenses against missiles, and an Interim Agreement that capped the numbers of intercontinental ballistic missiles and submarine-launched ballistic missiles at existing levels. This combination shows that the agreement was about limiting arms, not deploying new ones or wiping them all out. The full name of this treaty is the First Strategic Arms Limitation Treaty, so that option describes SALT I accurately. It wasn’t about creating a Mars-Plan deployment, it didn’t establish a broad missile defense shield, and it didn’t eliminate all strategic weapons.

Tracking the sequence of Watergate events shows how a break-in sparked a widening investigation, leading to prosecutions and ultimately the President’s resignation. Nixon being elected in 1968 sets the political stage for his presidency. The key incident occurred in 1972 when burglars tied to the President’s re-election effort targeted the Democratic National Committee at the Watergate complex. In 1973 the burglars were convicted, and the investigation intensified, bringing to light connections to the White House. By 1974 the accumulating evidence and the threat of impeachment forced Nixon to resign. This order—election, break-in, convictions, resignation—best matches the historical sequence. Other options misdate events, misidentify the target, or place the events in a less accurate order, which doesn’t align with how the scandal unfolded.

The key idea is that this event showed the federal government stepping in to enforce civil rights, with the President taking active action. When nine African American students faced violent resistance and state authorities blocked their attendance at Central High, the President federalized the Arkansas National Guard and sent in the 101st Airborne to protect the students and uphold the Supreme Court’s desegregation ruling. This demonstrated that protecting constitutional rights in education could require direct presidential intervention and federal force, marking a clear turning point in how civil rights were enforced in the United States. Other options miss the main point: the incident wasn’t mainly about moderating American views, nor was it just about Northern awareness of Southern racism, nor was it a broad political focus on civil rights in general. The defining feature here is the President’s decisive involvement to enforce desegregation.

Red Scare describes the fear of communism that swept the United States. After the Bolshevik Revolution in 1917, Americans worried that communist ideas could spread to the U.S., leading to suspicion, political repression, and government investigations of suspected radicals. The term covers periods of intense anti-communist sentiment, including the era after World War I and the much more heated 1950s climate tied to McCarthyism. The Bolshevik Revolution is the event that sparked the fear, not the fear itself, while McCarthyism is a specific campaign within the later period. Capitalism is simply the economic system opposed to communism, not a fear. So the term that refers to the fear itself is Red Scare.