Countries changed in response to Keynes's ideas such that D. They became more willing to regulate private businesses.
<h3>How did Keynes changed economic activity?</h3>
John Maynard (Alex) Keynes was of the impression that the government needed to be more involved in the market as opposed to letting the economy run itself.
His argument was so convincing that many nations began to regulate private businesses more in order to help their economies.
Options for this question are:
A. They began to tax foreign imports at a much higher rate
B. They reduced business taxes to encourage job growth
C. They eliminated welfare programs for the very poor
D. They became more willing to regulate private businesses
Find out more on John Maynard Keynes at brainly.com/question/1171653.
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