Given the task definition and input, reply with output. In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

Title: Betty breaks her phone. Sentence 1: Betty is outside playing with her nephew. Sentence 2: She has her phone in her back pocket. Sentence 3: She runs and falls onto the ground chasing her nephew. Sentence 4: She gets up and dusts the dirt off of her pants. Choices: a. Mom reminded everyone to be fair. b. She try's to check her phone and realizes the screen is broken.
b