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.

Title: Secret Notes. Sentence 1: Luke had a crush on a girl named Tammy. Sentence 2: Luke would write love letters for her in invisible ink. Sentence 3: He would leave his letters in her desk for her to find. Sentence 4: Unfortunately Tammy didn't know how to read the letters. Choices: a. He learned that it was situational to play his favorite game. b. Luke never told her how he felt and she never figured out the letters.
a