On first glance, in the underlined part, the term "turnover" and the term "revenue" form a compound subject, so use a plural form of the verb is used--> are used
A is out
(B) use of the term "turnover" and the term "revenue" in business across the Atlantic; in the United States, "turnover" refers to how rapidly the inventory acquisition and transaction occurs whereas.......is the difference in the way the term is used, or or in the usage of term ??? meaning wise "way" makes more sense, B is out
(C) way the term "turnover" and the term "revenue" are used in business across the Atlantic; in the United States, "turnover" refers to how rapidly the inventory acquisition and transaction occur since.. The since in the end doesn't keep the comparison intact
(D) usage of the term "turnover" and the term "revenue" in business across the Atlantic; the rapidness of inventory acquisition and transaction is called "turnover" in the United States whereas....... is the difference in the way the term is used, or or in the usage of term ??? meaning wise "way" makes more sense
(E) way the term "turnover" and the term "revenue" are used in business across the Atlantic; in the United States, the rate at which the inventory acquisition and transaction occur are called "turnover" whereas.... E is correct, Verb issue fixed + no other new issue