I believe it is: rationality.
A solid is a state of mater, which is stable can can not change physical shape unless something changes it (erosion,etc)
Answer: B
Explanation:
"icy" when describing a person's attitude or personality means cold, rude, etc, but a smile is usually happy and warm.
Personally I don't think it's an oxymoron- it's definitely possible to do a rude, fake smile. But B is what an oxymoron is- two words that are opposite in meaning and shouldn't technically be used together- like "awfully good" or "bittersweet."
Third person omniscent can read the thoughts and feelings if the charecters while third person limited can only see them and what they are doing/saying
D. Brainstorming, drafting, revising, editing, publishing