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: BBC Earth. Sentence 1: Tom watched BBC Earth one day. Sentence 2: He loved the documentary style film. Sentence 3: He felt it changed his life. Sentence 4: After watching that series, he decided to become a Naturalist. Choices: a. To this day, he credits BBC Earth for changing his life. b. Gina was the best cheerleader on the squad.
b