What would be the least helpful advice to give Brian, who is unsure about achieving his goal of an associate's degree in two years?

Changing his major would be the least helpful advice for Brian in the context of achieving his goal of earning an associate's degree in two years. When someone is unsure about achieving their academic goals, it is crucial to assess their current situation and schedule. Changing majors can often lead to additional required courses and may extend the time needed to graduate, particularly if the new major has different prerequisites or a more extensive curriculum.

Instead, reviewing his course load would help identify if he is taking on too much or too little, speaking with an academic advisor would provide him with expert guidance specific to his situation, and setting short-term academic goals can help him stay focused and motivated. These strategies can all address Brian's concerns directly and enhance his chances of success, making them far more beneficial than changing his major at this stage.