According to social exchange theory, helping behavior is guided by reciprocity norms.
Social exchange principle is a sociological and mental principle that studies the social conduct in the interaction of two parties that enforce a price-advantage analysis to determine dangers and advantages.
A easy example of social exchange idea can be seen within the interaction of asking a person out on a date. If the person says yes, you have gained a reward and are in all likelihood to copy the interplay through asking that man or woman out once more, or via asking a person else out.
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It would be B because it is trying Members that did something against the military law
cool-summer humid continental
Answer:
The Chinese had to open five ports to foreign trade
