Bunuel
The newly elected baseball commissioner has asked that a federal arbitrator would mediate negotiations between representatives of the umpire's union, which has threatened to go on strike, and the lawyers representing major league franchise owners.
A. that a federal arbitrator would mediate negotiations between representatives of the umpire's union, which has threatened
B. that a federal arbitrator mediate negotiations between representatives of the umpires union, which have threatened
C. of a federal, arbitrator that he mediate negotiations between representatives of the umpire's union, which have threatened
D. a federal arbitrator that he mediate negotiations between representatives of the umpires union, which has threatened
E. a federal arbitrator to mediate negotiations between representatives of the umpire's union, which has threatened
KAPLAN OFFICIAL EXPLANATION:
E
(A), (C), and (D) are all awkward and unidiomatic. (B) uses an acceptable idiomatic form,
asked that a federal arbitrator mediate, but it then violates subject-verb agreement by using the plural verb
have with the singular subject
union. (E) uses the proper singular verb form
has, and another acceptable idiomatic expression: "has asked a federal arbitrator to mediate negotiations between representatives of the umpire's union, which...".