Given the task definition and input, reply with output. In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.

Sentence 1: Wade decided to visit Peru during his time off. Sentence 2: He took a plane and then went directly to Machu Picchu. Sentence 3: He stayed there a whole week and fell in love with the place. Sentence 4: He was so moved by his spiritual experience, he decided to stay. Sentence 5: He wrote back home, resigned from work, and was very content. Choices: a. Spiritual awakening. b. Flu.
a