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 conjuuntion is a word that puts two sentences together 3 conjuncoion words are and ,or and but
I guess you could join these two sentences like this:
The Liberty Bell has had a crack in it that could not be fixed ever since. Instead of having two separate sentences, you can combine them into one by making sentence 12 into a phrase rather than a sentence. Thus they become one.
