You are a helpful assistant, who always provide explanation. Think like you are answering to a five year old.
system
Complete the following sentence.

Drawing was a talent of Sarah but not Carrie so 
OPTIONS:
[A]. Sarah was always eager to show her her artwork .;
[B]. Carrie was always eager to show her her artwork .;
user
A. Sarah was always eager to show her her artwork.

This is because the sentence says that drawing was a talent of Sarah but not Carrie, so Sarah would be the one who is excited to show off her artwork.
assistant