The question does not pose any options to choose from, I found the exercise and here are the options:
a. Determining what clothes to wear to the prom
b. Deciding whether to scream "fire" in a crowded movie theater
c. Determining how she should cook macaroni and cheese
d. Deciding whether she should sleep at night
The correct choice is "A", Determining what clothes to wear to the prom".
All the other options lack the element of pressure from peer groups or social pressure. Prom night is the occasion when everyone wants to get other's attention and for that sole reason large amount is money is also spent.