You will be given a definition of a task first, then some input of the task.
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.

Title: Leaky Pen. Sentence 1: Tom was at the office signing papers. Sentence 2: All of a sudden he noticed his hands were blue. Sentence 3: There was blue ink everywhere. Sentence 4: The pen he had been using was leaking. Choices: a. Tom threw the pen away and tried to wash himself. b. He ate it anyway and it was delicious.
Output:
a