Q: In this task, you're given a context, a question, and three options. Your task is to find the correct answer to the question using the given context and options. Also, you may need to use commonsense reasoning about social situations to answer the questions. Classify your answers into 'A', 'B', and 'C'.
Context: Riley asked Casey's questions for her when Casey was out sick. 
 Question: Why did Riley do this? 
 Options: (A) did this to sabotage (B) go to the event (C) did this to be helpful
A:
C