The answer is C
Answer A is showing more than one chairman of the board, and answer B is just wrong. Answer D is showing more than one chairman of the board has posession of the microphone, but the sentence indicates that there is only one chairman of the board, so therefore, the answer C is the one you want because it is showing singular possession of the microphone
I believe this poem is about making moon shine becuase it talks about being in the woods the mother is making food and the cooper still in burning in the fire.
Immense can be defined as very large, huge or gigantic. You could probbaly use any synonym of "big" to define it.
~Hope I could help! Stay Safe!~