All of the following are examples of price discrimination except a. charging more for hardcover books than paperback books because the cost of producing hardcover books is higher. b. charging less for matinee movies than evening movies because matinee movie goers are more price sensitive. c. offering financial aid for a summer camp because wealthier parents are able and willing to pay more than poorer parents. d. offering student discounts at a restaurant because students are more likely to eat at home if restaurant prices are high than are non-students.