I'm pretty sure the answer is D because it seems like the most logical statement that could be made by an explorer.
bolder darker and makes them more important
Even though is tru that the D. option is one of the characteristics of this type of music, The one that perfectly describes it is the C. option: It was performed with no instruments. This type of music is very similar to the gregorian musica and there is an absense of instruments.
Answer:
By using your voice and/or sound
Explanation: