"at the local high school, the baseball coach gives his players a punch on their ""workout punch card"" for every work out they complete outside of the regimen given by the coach. after a player gets 10 punches on the punch card, they are exempt from one early morning conditioning the next week. the punches on the punch card functioned as reinforcers."

In the situation explained above, the punches on the punch card functioned as positive reinforcers. This is because the punches on the punch card make it more likely for the players to individually complete work outs more regularly outside of the regimen given by the coach.

there are conflicting perceptions. what cannot be denied is that despite a long history of discrimination, they finally chose to bow out in grace and handed over power to the majority. it was a painful experience for them to part with their prerogatives and some chose to leave the country. however, they did decide to bite the bullet and go through the process with minimum obstructions.

presently, whites are still a force to reckon with. they are well educated, have technical and business expertise, they understand imperatives of good governance and are responsible for keeping south africa connected with developed countries. despite a bitter history, they are useful team members of the south african team.

answer; i believe that the correct answer is (d); // supercontinent