Definition: 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'.
Input: Sentence 1: Carla was going to the post office. Sentence 2: She decided to walk there. Sentence 3: Carla checked with the clerk for her mail. Sentence 4: She had a huge package waiting for her. Sentence 5: Carla left and returned in her car for the package. Choices: a. The Package. b. The Missing Basketball.

a