With no explanation, chose the best option from "A" or "B". Carl arrives at the school cafeteria for lunch when he realizes that he forgot his lunch bag on the school bus. Carl wants something to eat for lunch.

A: Carl borrows a few dollars from a friend and uses it to buy a sandwich to eat.
B: Carl digs through a trash can and finds a couple half eaten pizza slices which he proceeds to eat for lunch.
A.