Keynes advocated the use of taxation and government spending to influence the level of GDP in the short run

A production possibilities curve that is linear (a straight line):

a. illustrates a tradeoff in which opportunity cost of a good increases with the level of its production. b. illustrates a tradeoff in which the opportunity cost of a good decreases with the level of its production. c. illustrates a tradeoff in which the opportunity cost of a good is constant at all levels of production. d. demonstrates the fallacy of composition.

What are some extensions to the simplified model of the loan able funds market?

What will be an ideal response?