Shari and Mary have a business that provides personal fitness training services. They know that after raising their prices from $40 to $60 per hour, the quantity of hours they spent delivering training services fell from 90 to 50 hours per week. The demand for their services is:
A.
inelastic, with a price elasticity coefficient greater than one.
B.
inelastic, with a price elasticity coefficient less than one.
C.
elastic, with a price elasticity coefficient greater than one.
D.
elastic, with a price elasticity coefficient less than one.