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.
Q: Title: Fast Food. Sentence 1: Tom was hungry. Sentence 2: His wife was on her way from home. Sentence 3: Tom asked her to pick up some fast food. Sentence 4: His wife got some for both of them. Choices: a. Tom was thankful and got full. b. Tom got rid of the fleas easily.
A: 
b