Given the task definition and input, reply with output. 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: Morning Solitude. Sentence 1: The warmth of the early morning sun beams across my face. Sentence 2: The pavement below my feet is splattered with tiny pebbles. Sentence 3: I stop to remove the offensive stone from my ill-fitting sandals. Sentence 4: I resist the urge to remove them altogether and walk barefoot. Choices: a. Continuing on my morning walk I bask in the glow of the sun's warmth. b. It made her hair even greasier, so she threw it out.

a