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: Farming Time. Sentence 1: Todd had built his first home garden. Sentence 2: It had everything from cucumbers, carrots to lettuce and onions. Sentence 3: After the first week, he noticed that the plants were growing slowly. Sentence 4: Going online, he bought fertilizer and other items to spur growth. Choices: a. After just five weeks, his garden sprouted vegetables for a month. b. Evan was happy that he had spent his birthday with his friends.
a