Bunuel wrote:
The success of recent class-action lawsuits filed against three large mail order book clubshave led to a revision in the contractual language used by similar businesses .
A. have led to a revision in the contractual language used by similar businesses
B. has led to a revision in the contractual language used by similar businesses
C. has led them to a revision in the contractual language used by similar businesses
D. leads them to a revision used in the contractual language by similar businesses
E.
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