Which of the following is an example of a progressive schedule of reinforcement? Reinforcement after 1 behavior, then after the next one, and then after the next one Reinforcement after 1 behavior, then after the 3rd, and then after the 3rd again Reinforcement after the 2nd behavior, then after the 4th, then after the 5th Reinforcement after the 2nd behavior then after the 4th, then after the 2nd again