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: Change of heart. Sentence 1: Peter was a hitman with a heart of gold. Sentence 2: He always let his prey go away without killing them. Sentence 3: His clients were less than happy with his work. Sentence 4: So after a while, Peter had to change his career. Choices: a. He now takes care of charities and he's a lot happier. b. So William had see his company decline and lost everything.
b