Which of the following is the best example of perfect price discrimination 

A People who collect the mail coupons get discounts at the local food store 

B StudentsStudents pay lower prices at the local theatre 

C The local pubThe local pub offers a happy hour from 5 PM to 6 PM on a Wednesdayhappy hour from 5 PM to 6 PM on a Wednesday 

D Universities give entry scholarships to poorer students 

E A hotel charges for its rooms its rooms according to the number of days left before the check dash in date number of days left before