You put the word "more" in front of n adverb. For example: Jimmy was running *more steadily* than Sarah. Hope this helps :3
There was war, so the plane got shot down?
I would save a doctor on a lifeboat because if anyone was injured or hurt in the ship wreckage and you were in the middle of the sea, they could provide much needed emergency medical assistance.
I hope this helped! :-)
I would go with D, but tell me if I'm wrong or not
good luck xx