Answer:
Swift says that it is common to see impoverished people in the street of Ireland.
Explanation:got it right on edge2020
There is more than one conjunction in the sentence, the word but acts as a coordinating conjunction. Also the words not only and but also act as a correlative conjunction.
The answer is C. to prove
This is math, not English, but okay xD
"Two intersecting lines are perpendicular if and only if they form four 90 degree angles" would be my answer.