Exposure to acids during usage testing typically causes a reversible chemical irritation of the pulp. The pulp responds with a moderate inflammatory reaction—injury is present but not irreversible—so the tissue remains viable and heals over time. This inflammatory response is expected to subside after about eight weeks as the pulp recovers and reparative processes can occur. Severe pulpal necrosis would indicate irreversible damage, which isn’t the usual outcome with controlled acid exposure. No adverse effect would imply no reaction at all, which isn’t consistent with an acid-induced irritation. Pulpal calcification can occur in some chronic irritation scenarios but isn’t the primary, time-bound response described here. Thus, moderate pulpal inflammation best fits a reversible irritant effect resolving in about eight weeks.