1. They help the setting become more realistic.
2. They could even help the main character on stage feel less anxious, since they're not the only one up there.
They feel as though the mans presence is ominous in a way, saying he's sullen would suggest he's viewed poorly by them
The whole sonnet is, in my opinion, about the fact that this woman does not love the poet - she is hiding her feelings well, and thinking about somebody else. So, the correct answer could be either C or D.
Answer: half dark half light?
Explanation: What subject
This is called, "First person narrative".