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: Cookies. Sentence 1: Our building had a summer party today. Sentence 2: A caterer served ribs, chicken, and burgers outdoors. Sentence 3: The manager had cookies in the clubroom indoors. Sentence 4: My wife took some back to our apartment. Choices: a. Someone put a gun in Sherries bag and she missed the flight. b. A neighbor saw her and tried to get cookies but the supply ran out,
b