Other Things Constant, How Would a Smaller Marginal Propensity to Save

Multiple Choice

Other things constant, how would a smaller marginal propensity to save affect the consumption function?  

A)  The smaller the marginal propensity to save, the longer the consumption function. 
B)  The smaller the marginal propensity to save, the shorter the consumption function. 
C)  The smaller the marginal propensity to save, the flatter the consumption function. 
D)  The smaller the marginal propensity to save, the steeper the consumption function.