The answer is C. Cause and effect
Answer:
Percy starts to suspect that Ares wasn't acting alone when Ares goes it to a trance and the starts talking to himself.... because Ares is going to say that to everyone because Ares is the God of War.
Physically: Yes
Mentally: Sometime no.
Not everybody has killed before. So it really depends.
Some people will reach to depression if they "accidently" killed someone
