Given the task definition and input, reply with output. In this task, you're given the title and three arbitrary sentences out of a five-sentence story. You are also given three additional sentence options, a, b, and c, that may or may not belong to the story. Your job is to pick the two options that seamlessly connect with the rest of the story; note that the selected choices may fit into the story at any point. Indicate your selected choices in order, i.e., as 'ab'/'bc'/'ac' and not as 'ba'/'ca'/'cb'. If options are equally plausible, pick the ones that make more sense.

Title: He finally got a cell phone! He called all his friends. His mom got the bill and got really angry. Choices: a. Randy had just started junior high. b. Mort accepted the offer and slowly forgot about his boxing dreams. c. Randy had cost her a lot of money!
ac