Instructions: 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.
Input: Title: The Flying Saucer. Sentence 1: Evan concluded that aliens must exist. Sentence 2: He was looking at the sky in his telescope one night. Sentence 3: As he looked through the scope, he noticed a large disc shaped object. Sentence 4: Evan gasped realizing it must be a flying saucer. Choices: a. He heard laughing and saw his friend holding a paper plate. b. She almost stepped on it.
Output:
a