Which of the Following Statements Is True About Tying Agreements

Multiple Choice

Which of the following statements is true about tying agreements?

A) They usually increase competition among firms.
B) They become null and void when a buyer is required to purchase one product in order to get another product.
C) They are mandatory for verbal contracts.
D) They are illegal under the Clayton Act.
E) They become legal only when they contain a noncompete clause.