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: Ride. Sentence 1: My wife took our car in for service yesterday. Sentence 2: She had to take mass transit to work. Sentence 3: She is not used to the MBTA, but managed. Sentence 4: She planned to take the bus to get the car. Choices: a. Her co worker graciously gave her ride to the service station. b. Tracy ordered the last two items online.
a