If Consumers Respond to a 10% Price Reduction by Buying

If consumers respond to a 10% price reduction by buying twice as much of a particular good, we would conclude that:

A) there was excess demand at the original price.
B) there was excess supply at the original price.
C) the price elasticity of demand at the original price was greater than one.
D) the price elasticity of demand at the original price was less than one.