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: Jaime had to run twenty miles a day. Sentence 2: He was training for long distance running. Sentence 3: His dog would always tag along for the run. Sentence 4: Without warning a pickup truck swiveled onto the sidewalk. Sentence 5: The dog was able to pull Jamie out of harm's way. Choices: a. Alice New Cell Phone. b. Man's Best Friend.
b