The correct answer is C. metaphor.
"Bright beams" that Nature has wrapped in black are Stella's eyes. In a way, it is also a simile, but every metaphor is a contracted simile (without "like").
There are other literary devices in this passage as well: contrast (black - bright), rhetorical question (one that doesn't have an answer, or an answer is obvious)...
1. She told us she didn’t eat meat.
2. They said they would be late.
3. I told you it would rain!
4. Connor said he could speak five languages!
5. Dad said he would help me.
6. We told them we couldn’t go to the party.
The best revision of the sentence that avoids the misconception is "Moreover, the constant exposure of ads is annoying" to avoid the misconception. The misconception that can happen here is the notion that the advertising is exposing someone. To eliminate this misconception, the sentence must be made<span> more effective. Thus, the revision above is the best way to avoid it.</span>