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 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: Sodas. Sentence 1: I was addicted to soda again. Sentence 2: I was drinking three or more per day. Sentence 3: I decided to switch to diet sodas for a while. Sentence 4: It didn't work, as I continued to buy ones with caffeine. Choices: a. Inside the back of their closet, she found several jars with spiders. b. I started drinking water and taking caffeine pills as a substitute.
a