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'.

Sentence 1: John is having a bet with his friend. Sentence 2: He bets he can make it all the way home with half a tank of gas. Sentence 3: While driving about 3 miles away from home the car starts slowing down. Sentence 4: John eventually runs out of gas 1 mile away. Sentence 5: John loses the bet. Choices: a. John runs out of gas. b. Maine Vacation.
a