Question $31$

$2pts$

Before $1890,$ John D$.$ Rockefeller was able to combine competing companies under a trust which

created cooperative arrangements that established prices and allocated portions of the business among its members.

allowed Rockefeller to buy enough voting stock to exercise control over his competitors.

required the federal government to enact laws protecting monopolies.

forced his competitors to sell their businesses to the Standard Oil Company, allowing Rockefeller to control $91\%$ of the industry by $1904.$