I would consider it a mood because it can change over time.
EX: You can be enthusiastic one moment, then sad the next.
I believe it may be c,because interior monologue is a character's inner thoughts.
Answer:
Verb : You can document something (write it down)
Noun : You write on documents (a piece of paper containging information)
Explanation:
A verb is an action, so when you document something you are completeing an action.
A noun is a person, place or thing, so a document (a thing) is a noun.