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Answer:
I had to do something similar to this a while ago and I wrote about where bananas come from lol
A person of great knowledge of money and business
The answer would be an opportunity cost
.The only sentence that contains a parallel structure is option B. Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal
Options A,C and D are not ´parallel structures because they do not carry the same tense
Parallel structure means that the items included in a list must be in the same form, in this case all main verbs are in the past simple