When a political party comes to power, its leaders tend to place many of their faithful followers into important public offices. The use of public offices as rewards for political party work is known as the "Spoils System." The system is popular in numerous nations.
C push factors are negative things
Television did that. People watched their advertisements then they knew about it, they tried and they loved it. So, TV encouraged them
In short, Option C is your answer
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The American Medical Association was established in D. 1847