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: Forgetting the interest. Sentence 1: Susie got her credit card bill. Sentence 2: When she looked at it she was confused. Sentence 3: It was more than she thought. Sentence 4: Then she noticed it was adding interest. Choices: a. Susie sighed and proceeded to just pay it. b. I shut the door in the face of a black bear!
a