They came . Scratching at the door , my friends and neighbours . I looked them in the eye just so I could know that they were n't there anymore . I shot them . I shot them dead , again , my friends and neighbours .

Select from:
- He shot them because they were using a battering ram on his door .
- He shot them because they were zombies .
- He was dreaming that he shot the neighbors at his door .
- The Neighbors on the other side of the door all had guns as well .
Answer the following question: Why did the narrator shoot his friends and Neighbors ?
He shot them because they were zombies .