Given the task definition and input, reply with output. 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: American. Sentence 1: Spencer's first credit card had just arrived in the mail. Sentence 2: He was very excited and decided to go shopping. Sentence 3: Spencer went from store to store buying lots of new clothes. Sentence 4: At dinner, his waiter came and told him his card had been declined. Choices: a. Spencer had spent too much money and maxed out his credit card. b. When May finally passed, she didn't left nothing but a corpse.
a