A California hospital decided to streamline its surgical suite operation. In order to speed things up, the nurses in charge studied how much time patients actually spent in various activities. They found that on average, a patient scheduled for an operation spent about 1.50 hours waiting and 2.00 hours in moving from lab to x-ray to the operating room. The average operation takes 1.50 hours. What is the manufacturing cycle efficiency (MCE)? 

a. 30% 

b. 36% 

c. 100% 

d. 60% 

e. 50%