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: Jimmy Cures His Depression. Sentence 1: Jimmy was feeling depressed lately. Sentence 2: He decided to go to his doctor for a check-up. Sentence 3: His doctor prescribed him anti-depressants. Sentence 4: Jimmy took anti-depressants everyday according to his doctor. Choices: a. Jimmy felt better and was able to continue on with his life. b. Then all of a sudden I saw it fall in the hole.
a