Pat Robertson, a TV evangelist and former Republican Party candidate for president, once said that "debt is an affront to God," so good Christians should not spend beyond their incomes. Indeed, Robertson wants Christians to save more. If more Americans, Christians as well as others, took his message seriously, how would we represent the result using a Keynesian macroeconomic model?

a. a downward movement along the consumption function
b. an upward movement along the consumption function
c. a downward shift of the consumption function
d. an upward shift of the consumption function

c