Definition: In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.
Input: Sentence 1: Ben got out of the school bus. Sentence 2: He walked to a nearby vending machine to purchase a bag of chips. Sentence 3: At the same time, he noticed someone next to him. Sentence 4: The guy was on the verge of passing out. Sentence 5: Therefore, Ben gave his bag of chips to him. Choices: a. Quick to Join. b. Generous Offer.

b