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: Forgotten Towel. Sentence 1: Andy recently went to the beach in Key West. Sentence 2: After a long swim in the ocean, Andy toweled off. Sentence 3: Andy then decided he would start heading home. Sentence 4: Andy gathered his things, and began to drive home. Choices: a. Kate was very pleased with her basement find. b. However, after reaching home, Andy noticed he forgot his towel.
a