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 does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.

Title: Stammer. Sentence 1: Jeremy stammered when he talked and people made fun of him. Sentence 2: He was so desperate to make the jokes stop, he stammered even more. Sentence 3: He took many lessons to help him stop stammering. Sentence 4: But as he couldn't stop, he started singing instead. Choices: a. Despite this, Gabriel was relieved to have to cancel the concert. b. To his satisfaction, when he sang, people stopped making fun of him.

a