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: Slippery Floor. Sentence 1: The tile floor in our bathroom has been slippery lately. Sentence 2: This morning I went to use the bathroom. Sentence 3: My cane slipped on the floor and I fell. Sentence 4: My wife helped me up. Choices: a. We bought a bathroom rug this afternoon. b. Kim no longer had to worry about what she would choose for dinner.
b