Cappella music is always played with the voices of one singer or others without musical instruments accompanying them. I hope this helps!
The conjunction would be c. and
and is a connecting conjunction of two ideas in the same sentence
You did not provide the lines, however, imagery is often used when the writer wants to create a visual image in the minds of his/her reader. It usually consists of numerous descriptions that are often vivid and colorful and highly detailed. You can use that logic on the lines that you might have and see what the correct answer is.
