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: Presents 2. Sentence 1: When I woke up my mother, I told her Santa had arrived. Sentence 2: She got out of bed and went to see what I was talking about. Sentence 3: She said he was still in the kitchen. Sentence 4: I went to bed, but she told me not to look. Choices: a. I looked anyway, and saw he wasn't there. b. Using what his mother had taught him he refused the offer.
b