Read the following context and choose the best option to answer the question.
Context: My boyfriend at the time , who was asleep , jumped up , and poor Fred , who was n't a mouse at all , flew straight into him .
Question: What was the reason the dog bit my boyfriend .
Options: 
- He startled him .
 - None of the above choices .
 - He got out of bed .
 - He was asleep at the time .


He startled him .