I assume it is the D, the river. The other answers don't make any sense and the river would 'reflect' the hues of the sky.
Answer:
A
Explanation:
I am assuming that this is what your teacher is looking for. I have been in theater for years and non of my duets were ever required to be published or 10 minuets long. If the answer isn't A, it is all of the above.
sorry i know that wasn't very specific, but i hope it was helpful
The answer to this question is b