Common. People who are common to us, at least in most cases...
I believe the answer is: Positive reinforcement
Positive reinforcement refers to a desired reward/stimulus that given to encourage an individual in doing a certain behavior.
In this case, music as something that jenny's crave and her craving is rewarded everytime she repeat the behavior of opening up the channel
Answer:
Political parties start on the local level, move to state level, and then to national level. Due to progressive reforms, local party organizations are usually weak.
Hope this helps you.