In the Above Figure, ________ Will Shift the Demand Curve

Multiple Choice

In the above figure, ________ will shift the demand curve from D to D1.

A) a fall in the cost of producing pizza
B) buyers' expectations that pizza will be less expensive next week
C) a scientific article published that demonstrates eating pizza is good for one's health
D) an increase in income if pizza is an inferior good
E) a decrease in the price of a sub sandwich, a substitute for pizza