Answer:
when, where, how, and to what extent (how much or how long).
Explanation:
C. that's an awesome costume!, he exclaimed.
Average similarity index – up to about 50% of matches
It is quite normal for an essay to have up to 50% of matches to other items; or even more. This does not mean you are guilty of plagiarism.
I'm pretty sure it's D. Trees!
Trees are actually known for reducing greenhouse gases! They absorb it, and they produce oxygen: so Trees are the "solution" to the problem, not the cause for it!
Because she does not understand the American rules of chess