Positive reinforcement, also known as positive reinforcement, is the use of encouragement to affirm certain behaviors, make individuals feel beneficial, and are willing to maintain their positive behaviors. According to the above definitions, Which of the following are positive reinforcements:. ["A's speech in the class was publicly praised by the teacher, and his number of speeches increased significantly later.", 'B met the leader once when he was late for work, he would never dare to be late again.', "C's office is stolen, and he has to check the doors and windows every time he leaves the office.", 'D found that no one laughed at his spoken pronunciation in the English corner, and he often went to the English corner in the future.']