Rubin's friends ask if he wants to go camping this weekend. although he could use the fun and relaxation, rubin stays home and studies because he knows his chances of getting into medical school next year depend on the grades he gets this semester. according to mischel, rubin is demonstrating his tendency to . focus on cognitive rewards over extrinsic rewardsb. delay gratificationc. respond to conditional positive regardd. create cognitive-outcome expectancies