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.
Q: Title: The Architect. Sentence 1: The man was working hard to design a building. Sentence 2: He wanted it to be beautiful and functional. Sentence 3: He selected some design elements that were revolutionary. Sentence 4: When he was finished, he presented it to the board. Choices: a. Mildred was so grateful! b. They loved the idea!
A:
b