In a Simple Macro Model with Demand-Determined Output,the Simple Multiplier

Multiple Choice

In a simple macro model with demand-determined output,the simple multiplier is equal to 1/(1-z) ,where z equals the

A) average propensity to spend.
B) average propensity not to spend.
C) level of autonomous expenditure.
D) marginal propensity to spend.
E) marginal propensity not to spend.