Q: 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: The Lighter. Sentence 1: I lost my lighter and had to buy a new one. Sentence 2: I looked at all the colors. Sentence 3: I chose red and black because they are my favorite colors. Sentence 4: I thought about getting patterned ones too. Choices: a. Ultimately I bought the plain red and black. b. Her grandson stepped out of the car in his navy uniform.
A:
a