Joanne Went to the Mall on Her Lunch Hour and on an Impulse

Multiple Choice

Joanne went to the mall on her lunch hour and on an impulse decided to buy herself a gold necklace.After work,she went back and returned the necklace because after talking with her mother she realized it was very expensive and she really didn't need it.What part of her self made the decision to return the necklace?

A) I
B) me
C) ego
D) alter ego