A horizontal restraint of trade differs from a vertical restraint of trade in that the horizontal restraint of trade:

a.follows the rules stated in the Sherman Antitrust Act of 1980.

b.limits the competition between rival firms in the same industry.

c.follows the rules listed in the Clayton Antitrust Act of 1914.

d.follows the rules listed in the Robinson-Patman Act of 1936.

e.limits the competition between a government producer and a private retailer.