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: Arachnophobia. Sentence 1: Hiro loved going on holiday. Sentence 2: His last holiday was in Australia. Sentence 3: When he went to Australia, he saw a lot of dangerous animals. Sentence 4: One of these animals was a spider, which he was very scared of. Choices: a. Tim finished school this year and is opening his own law firm. b. Hiro decided to holiday in safer areas in future.
b