The Formula for the Point Price Elasticity Can Be Written $\eta$

Multiple Choice

The formula for the point price elasticity can be written as:

A) $\eta$ = ( $\Delta$ Q / $\Delta$ P) (P / Q) .
B) $\eta$ = ( $\Delta$ P / $\Delta$ Q) (P / Q) .
C) $\eta$ = ( $\Delta$ Q / $\Delta$ P) (Q / P) .
D) $\eta$ = ( $\Delta$ P / $\Delta$ Q) (Q / P) .
E) none of the above.