You will be given a definition of a task first, then some input of the task.
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: Cruising. Sentence 1: I enjoy cruising very much. Sentence 2: My wife and I take a cruise vacation several times in a year. Sentence 3: We always put a lot of thought into the places we would like to visit. Sentence 4: We research ports, weather, and excursions until all three line up. Choices: a. Once we find an itinerary we're happy with, we book our vacation. b. His felt confident on his first day because of his new look.
Output:
a