A. Best the reason why it is not better (even though it sounds right) is because it says "out of the five cousins" there for we are comparing ben to five other people and he is the best.
Answer:
Low celebrates the completion of the Brooklyn Bridge and the hard work that went into building it.
Explanation:
I say this because in the third sentence, "At last we all rejoice in the signal triumph" they are clearly celebrating the completion of the Brooklyn Bridge and the hard work that went into building it.
