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: Felix taught science at the local high school. While the students were impressed, the school was upset with Felix. He was not fired, but Felix was given a stern warning by his boss. Choices: a. When the parents got home, Crystal was exhausted from her day. b. Felix once held a class experiment that involved a small explosion. c. Many of his students thought he was rather goofy for a teacher.
bc