In a mixed-market economy, the government regulates business A. Only when necessary
B. On a regular basis
C. As often as possible

A. Only when necessary

Explanation:

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it was on the rise and doing very well and would continue to do well until the great depression from 1929-1939

an interest group is an organization whose members share common concerns, and try to influence government policies that impact those concerns. elected officials frequently complain about the influence of "special interests" on american politics.