Context: Dave was n't just a genius writer - he was trying to help make new ones . Every time I read that his death was an apparent suicide , I jerk a little . I know what they mean , but to me there is nothing apparent about it . There is nothing apparent about why someone would do that . This is enough by itself to creep into the dark corners and reside .

Question: What may have caused Dave 's death ?
Options:
0. He passed away while writing .
1. He was killed by someone else .
2. Dave 's death was caused by homicide .
3. He killed himself .
Answer: 3