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 seamlessly connects with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes more sense.

Title: Soggy Socks. Sentence 1: Bob cursed as his foot went straight into a puddle of water. Sentence 2: He limped his way to the side door of the apartment building. Sentence 3: After struggling to remember the code, he came in from the rain. Sentence 4: When he got to his apartment, another tenant clicked her tongue at him. Choices: a. Bob looked to see he'd left a trail of wet footprints behind him. b. He was jumping around for hours.
a