Comparing the aggregate supply curve and the shortminusrun Phillips​ curve, we see that they

A.both exist because real wage rates are fixed in the short run.
B.describe the same phenomena but contradict each other.
C.each describe different parts of the economy.
D. both exist because money wage rates are fixed in the short run.
E.both exist since money wages are flexible.

ANSWER:

D. both exist because money wage rates are fixed in the short run.