The Formula for the Own- Price Elasticity of Demand for a Commodity

The formula for the own- price elasticity of demand for a commodity can be written as which of the following?

A) $\frac{\text {change in quantity demanded }}{\text { change in price}}$
B) $\frac{\text {perentage changeinprice }}{\text {percentage change inquantity demanded }}$
C) $\frac{\text {change in price }}{\text {change in quantity demanded }}$
D) $\frac{\text {perentage change in quantity demanded}}{\text { percentage change in price }}$
E) $\frac{\text {percentage change in one price }}{\text { percentage change in the other price}}$