Answer:
she didn't want to kill Duncan because killing him would seem as if she killed her own father and that decision would give her nightmares
As far as I remember there was no other way for the pilot. He was sentenced to a capital punishment as he commited a crime. But the actions, I thing, wasn't bad because he gave the possibility for the girl stowaway to communicate with her brother. I think it is enough for you and do hope you will find it helpful.
No the answer is not c it is a
