Answer:
C. The Robinson–Patman Act of 1936
Step-by-step explanation:
The Robinson-Patman Act of 1936 is an amendment to The Clayton Act of 1914, which particularly prohibits price discrimination. Price Discrimination is an act in which distributors or sellers of certain goods, give discounts to people who they seem to benefit more from while smaller shops buy the goods at a costlier price.
The instance where the major tire manufacturer has an agreement to make a price discount with the manufacturer of truck tires is an example of price discrimination, and the consequence is that other markets are affected as they now exit the market. This is a clear contravention of the Robinson-Patman Act of 1936.