A Production Center Is Available for 8 Hours Per Day

A production center is available for 8 hours per day in a factory.It is composed of several rotary parts,and the worker operating it is required to lubricate these rotary parts once each day.It takes 2 hours to remove these parts from the equipment,lubricate them,and reassemble them.The production center is not available for production during these times.The availability of the production center

A) is 50%.
B) is 75%.
C) is 25%.
D) cannot be computed with the given information.