Which if the following shows a similarity in the business practices of John D. Rockefeller and Andrew carnegie l?

A. Both formed important steel companies

B. Both relied on horizontal integration

C. Both tried to control competition to increase profits

D. Both created holding companies to buy other companies

The answer is option C.

Explanation:

While Rockefeller and Carnegie dominated different industries, the oil industry is Rockefeller and the steel industry is Carnegie. Both were known to try to control competition in their respective industries to increase their own profits. Business practices are the most cost - effective ways to do so. A company may have rules on business practices to ensure that its employees work effectively and comply with applicable laws.

The answer is C. Both tried to control competition to increase profits. While Rockefeller and Carnegie dominated different industries, Rockefeller being the oil industry and Carnegie being the steel industry. They were both known for trying to control the competition in their respective industries in order to increase their own profits.