It really depends on the context.
If you are using it in a noun phrase - first aid kit - you don't have to capitalize it. But, if you are saying - Certified in First Aid, then you would capitalize it, because it is the name of an assistance.
Answer:
C. The sound of the clock striking midnight quivered through the icy hallways, startling the restless house.
Explanation:
For a neutral viewpoint I would say D. But I'm not fully sure.
Go on google and type <em>kangaroo see a psychiatrist worksheet answers, </em>click on the first link. It should be a pdf
