Answer:
foot in the door phenomenon
Explanation:
Foot in the door phenomenon is a persuasion techniques that works/ relies on the size of the request being made. Experiments on this persuasion technique show that if you wish to make someone do a big favour for you, you only have to get them to do a small favour first. The above example illustrates the foot in the door phenomenon where homeowners agree to a large, ugly, unattractive installation of a sign board because they had started off agreeing to have a small one installed first.
B Flag Burning is Not Symbolic Speech
D. the movement of people from rural areas to cities.
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A Trade barrier are laws that limits free trades between countries or nations, An Embargo are type of laws that specifically cuts off trades, it may be import or export into specific countries. Either of these answers fit your question.