Q: 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: Referral Program.. Sentence 1: I found a website that sells personalized items. Sentence 2: They had a referral code coupon system. Sentence 3: I posted my code on a website, explaining the deal. Sentence 4: So many purchases were made that I accumulated high store credit. Choices: a. I hope I make the money soon. b. I ended up getting a bunch of customized stuff for free.
A:
a