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: Mark and Amy's mom died and they were cleaning her condemned house. Sentence 2: There was a painting of their old mother on the wall and they argued. Sentence 3: Neither of them wanted it but thought the other should take it. Sentence 4: Mark finally told Amy he was just leaving it for the bulldozer. Sentence 5: Amy was guilty and took it, only to discover $10,000 behind it! Choices: a. The Big Game. b. Hidden Treasure.
b