john maynard keynes developed new economic theories in response to the\no stock market crash of 1929.\no…

john maynard keynes developed new economic theories in response to the\no stock market crash of 1929.\no great depression of the 1930s.\no first and second world wars.\no economic boom of the 1950s.
Answer
Answer:
B. Great Depression of the 1930s
Brief Explanations:
Keynes developed theories to address the economic challenges of the Great Depression, advocating for government - interventionist policies to boost demand and employment.