Answer:
D. Internal and external trade developed productivity and economic activity in India
Concurrent means “at the same time.” they <span>are those that both the federal and state governments share simultaneously</span>
I think the answer "In practice, these provisions, including white primaries"
An amendment, passed by the U.S. Congress in 1914, meant to further promote competition in U.S. businesses and discourage the formation of monopolies. This act prohibited price discrimination, price fixing, and exclusive sales contracts. The act also legalized peaceful strikes and boycotts against companies.
Read more: http://www.businessdictionary.com/definition/Clayton-Antitrust-Act.html