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: Joe and Sam went to a local museum one Saturday. Sentence 2: When buying tickets, they paid extra to see the traveling exhibit. Sentence 3: Much to their surprise, the exhibit was about cannibals! Sentence 4: To their surprise, the exhibit was educational and not gruesome. Sentence 5: After their visit, they were pleased they bought the extra admission. Choices: a. Museum Visit. b. Liar.
a