Definition: 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.
Input: Title: An Ailing Spruce. Sentence 1: My favorite part of our backyard was a tall, ancient blue spruce. Sentence 2: One summer, needles were turning brown and dropping alarmingly. Sentence 3: I tried more watering and fertilizer stakes, but the tree got worse. Sentence 4: An arborist determined it was infected with an aggressive virus. Choices: a. Sadly, the tree couldn't be saved and had to be chopped down. b. I drove over a thousand miles back to where I lived when it was bought.
Output:
b