Coarse means rude or rough.
Thus the word that is best associated with the word coarse is B. Roughness.
Roughness is somehow similar to coarse, it shows cruelty or rudeness in some actions or words. Other term that can be used to describe it is being impolite.
a figure of speech which makes an implicit, implied or hidden comparison between two things that are unrelated but share some common characteristicssimilea figure of speech that makes a direct comparison between two different things with the help of the words "like" or "as"<span>onomatopoeia</span>