Margaret is an extravert. she has to study for a test in the morning. where is the most likely place she will choose to study?

Since Margaret is an extrovert she would like to see more people around her so that she can study by discussion. Extrovert likes to mingle with people and study by interaction as against self study or quiet study in a room.

So the best option that satisfies this is "In an open area of the library where she can see a lot of other students"