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 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: Stephanie the Singer. Sentence 1: Stephanie loved to sing. Sentence 2: She often sang to herself without anyone around. Sentence 3: One day she decided to sing in front of her friends. Sentence 4: Her friends were so impressed that they convinced her to perform. Choices: a. Stephanie now has a singing recital coming up next month. b. Leah is proud of herself for being able to help the environment.
a