What is price elasticity of demand?

It's a measure of the relationship between a change in the quantity demanded of a particular good and a change in its price.

I’d say either a or d i’m sorry if it’s incorrect.

Concurrent jurisdiction is the ability to exercise judicial review by different courts at the same time, within the same territory, and over the same subject matter. for instance, a domestic violence matter may be heard in either a general civil court or a family court in the same county.i hope that this you : )