Which of the following was not banned through Clayton antitrust act of 1914

a) price fixing

b) price index

c) price discrimination

d) tying contracts

By definition, the Clayton antitrust act of 1914 was amended by the United States Congress during 1914 as a ratification in the under-developed Sherman Antitrust Act wherein it generally contains policies regarding the prohibition of unfair business practices. In addition, the tying contracts are not included in the amendment.