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.

Let me give you an example: Title: Marcus Buys Khakis. Sentence 1: Marcus needed clothing for a business casual event. Sentence 2: All of his clothes were either too formal or too casual. Sentence 3: He decided to buy a pair of khakis. Sentence 4: The pair he bought fit him perfectly. Choices: a. Marcus was happy to have the right clothes for the event. b. He left in a huff for having his ideas mocked.
The answer to this example can be: b
Here is why: Marcus is buying clothes for a business event and not presenting an idea.

OK. solve this:
Title: The Train Accident. Sentence 1: Hugh was taking the train downtown one early morning. Sentence 2: Everybody packed in, on their way to work. Sentence 3: The train started shaking and making a loud screech. Sentence 4: It came off the track, fatally injuring several people. Choices: a. Becky waited and drove on. b. Hugh had to get a metal plate in his head, but he survived.
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
a