If Mastercard prohibits a merchant from accepting other credit cards if it wishes to be able to accept Mastercard from customers, is an example of: a. monopolization. b. price fixing. c. tying. d. resale price maintenance. If Crispy Clowns cereal refuses to sell cereal to grocery stores that also carry ChocoClowns brand cereal, this action would be an example of: a. monopolization. b. a vertical restraint of trade. c. a rightful and legally protected refusal to deal. d. horizontal refusals to deal