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: Sandra loved to walk along the beach. Sandra thought it would be fun to get one for herself as a hobby. She walked along the beach with her new metal detector the next day. Choices: a. He has a really good time with his date and has a nice night out. b. Upon reaching the end of her walk, Sandra found valuable rare coin! c. During a walk, she saw a man walking around with a metal detector.
bc

Title: He heard a smoke detector chirping once every few seconds. Tony got out of bed. Tony replaced the battery in the smoke detector. Choices: a. He got a battery out of the kitchen drawer. b. Tony woke up in the middle of the night. c. They mailed the postcard to Elizabeth's grandma.
ab

Title: Cayla got an ipad for her 3rd birthday. Eric was careless and he dropped it on their tiled floors. The worker was really nice and told her they'd fix the ipad for free. Choices: a. Their mom took the ipad to the apple store to get it fixed. b. Now I have to go back to return them. c. She let her brother Eric play with it one day.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
ac

