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: New Neighbors. Sentence 1: Tim noticed new neighbors moving in. Sentence 2: He figured he would greet them. Sentence 3: Before he could they knocked on his door. Sentence 4: They offered pie and introduced themselves. Choices: a. Tim got along well with them. b. He turned on the light, but it was just the lamp.
a