Answer:
variable-interval schedule
Explanation:
A variable-interval schedule is one of the schedules of partial reinforcement in which behavior or a response is rewarded after a variable amount of time, which is unpredictable, has elapsed. The time interval for rewarding behaviors continuously, after they have been initially established, is varied. For example, rewarding a lab rat for pressing a bar at first after one minute elapsed, then varying the time interval to 4 minutes for the same response to be rewarded and so on. The time interval is varied. Variable-interval schedule produces a slow but steady rate of response that is resistant enough to extinction.
It is basically how you feel about yourself , an example would be emotions, intentions, personality
C.
The answer is C, because that is the age that most people have "fun" and it is statistically proven to be that age group.
First you have to know how the disease is formed the you should make an experiment to try and reverse it. Make a hypothesis and cary out the experiment and see what happens and if you hypothesis was correct...Great!