Answer:
B) unitary elastic.
Step-by-step explanation:
Elastic demand describes how sensitive the demand for a product is to changes in prices. A good or service whose demand changes as a result of a change in price is said to be price elastic. When a product does not react to price changes, it is said to be price inelastic.
Unitary elastic demand is when a change in price results in a propositional change in demand in the opposite direction. A percentage change in price causes a similar percentage change in demand. An increase in price leads to a decrease in demand by the same degree, while a reduction in price will result in a proportionate increase in demand.