What is a token economy? select one: a. tokens are provided at variable intervals to increase the frequency of a desired behavior. b. tokens are provided at fixed intervals to increase the frequency of a desired behavior. c. tokens are exchanged for valued reinforcers to increase the frequency of a desired behavior. d. tokens gradually replace negative reinforcers to increase the frequency of a desired behavior?

C. tokens are exchanged for valued reinforcers to increase the frequency of a desired behavior.

Explanation:

In Token economy, the token could be anything that is considered as a reward.

For examples,

Let's say that you have a son.

In Order to encourage your son to make more effort on his test, you told him that you will give him one gold sticker every time he get B+ or higher on his tests. If he get 3 stars, he can exchange it with a box of ice cream of his choosing.

From the example of a token economy above, the gold stars acted as a token that reinforce the son's behavior. Since the son desire it so much, he will more likely to make more effort in studying, which is a desired behavior that the you want to impose to the son

they protect against unsafe foods and medicines being sold

explanation: