Which ofthe following best defines and values opportunity cost? Select one: 0 a. Opportunity cost is the value of the next best alternative that is given up in making a choice; it is the same for each person. 0 b. Opportunity cost is the value of the next best alternative that is given up in making a choice; it can be different for each person. O c. Opportunity cost is the explicit dollar value of the next best alternative that is given up in making a choice; it is the same for each person. 0 d. Opportunity cost is the explicit dollar value of the next best alternative that is given up in making a choice; it can be different for each person