Which of the following contributed to the start of world war i?
a. the spread of communism
b. the adoption of enlightenment ideas
c. the increased investment in european militaries
d. the shift from monarchies to more democratic governments

c) he felt the constitution clearly gave states this right.

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.