With no explanation, chose the best option from "A" or "B". Nagisa listens to his coworker's explain that they didn't eat Nagisa's lunch. Nagisa wants to respond to his coworker.

A: Nagisa says that he doesn't believe his coworker and demands repayment for lunch.
B: Nagisa asks his coworker to aid his search at finding the lunch eating culprit.
B.