Olivia Was Accepted by Northwestern and by Another University

Multiple Choice

Olivia was accepted by Northwestern and by another university.She is trying to decide where to go.Which of the following should influence her decision?

A) how much she spent applying to Northwestern,and the difference between living expenses at Northwestern and the other university
B) how much she spent applying to Northwestern,but not the difference between living expenses at Northwestern and the other university
C) the difference between living expenses at Northwestern and her second choice,but not how much she spent applying to Northwestern
D) neither how much she spent applying to Northwestern nor the difference between living expenses at Northwestern and her second choice