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.
Q: Title: Broken favorite cup. Sentence 1: Renny had a favorite cup he used every day. Sentence 2: One day she told her son to put it in the sink for her. Sentence 3: Her son grabbed the cup and walked towards the sink. Sentence 4: On his way there, he tripped on a toy that was left on the ground. Choices: a. Renny's son and her favorite cup fell to the ground and her cup broke. b. Sam felt bittersweet about it.
A:
b