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 does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.

Title: Wandering Off. Sentence 1: Rebecca loved to play volleyball at school. Sentence 2: She was good friends with all her teammates. Sentence 3: One day on a road game her teammate left the group. Sentence 4: Rebecca went after her but the bus left them behind. Choices: a. His grandmother was very hurt by it. b. They both missed the championship game that day.
a