In this task, you're given four sentences of a story written in natural language. The given story is not complete and your job is to complete the story by selecting one of the sentence choices from (A) and (B), such that the story sounds fully coherent.

Sentence1: Four Outlaws camped in Blood Gulch. Sentence2: They thought that they were safe, so they let their guard down. Sentence3: The sheriff was hot on their trail. Sentence4: He found them them early in the morning while they still slept. 
 (A) He arrested them. (B) He let them go free.
A