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: Barbarians. Sentence 1: Max's favorite history subject was barbarians. Sentence 2: Learning about them and their fights against the empire. Sentence 3: So as he grew up he learned to fight, and worked out. Sentence 4: Until one day he learned about LARP, where he could be a barbarian. Choices: a. He got it a new toy as a gift. b. Within three years he was the head barbarian in his game.
b