A Jeweler Cut Prices in His Store by 20

Multiple Choice

A jeweler cut prices in his store by 20%. As a result:

A) ​Its total revenue would fall by 20% if the elasticity of demand was zero.
B) ​Its total revenue would fall, but by less than 20% if the elasticity of demand is greater than zero but less than one.
C) ​Its total revenue would rise if the elasticity of demand is greater than one.
D) ​All of the above would be true.