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: The president has received a Letter. Sentence 2: The letter described a powerful weapon called an atom bomb. Sentence 3: The President agrees with the author that the US should develop it. Sentence 4: The President orders the Army to oversee development of an atom bomb. Sentence 5: The Army created the Manhattan Project to carry out the order. Choices: a. A Great Action. b. Picking on a Girl.

a