Do you have an example of the "text"? It's difficult to answer a question like this without seeing the text itself.
Main pieces of imagery can be something describing how stuff looks, smells, feels, or what it sounds like. It should create a picture in your head. So whatever helps illustrate the text for you is an example of imagery! Hope this helps!
The easiest way to figure out it is to simply say it naturally (assuming you're a native speaker). A is the only answer that doesn't include unnatural pauses.
Answer:
I Think its C
Explanation:
A There is a comma in the wrong place
B: Its to wordy
D: It doesn't make scene