Instructions: 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.
Input: Title: The Silverback. Sentence 1: One day at the zoo, I walked over to the gorilla enclosure. Sentence 2: A large male silverback gorilla walked out from the corner. Sentence 3: He sat in the center of the viewing area, as if posing. Sentence 4: He glared angrily at me the entire time I was there. Choices: a. I felt very guilty, like I shouldn't be there looking at him. b. He took it home with him that night, happy he had won a prize.
Output:
a