quick 3 5 paragraph discussion

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These are the instructions (it has to be 3-5 paragraphs and like 2 references in APA)

Discussion Board Question 5:

Part A) Explain what is meant by the “social construction of ethnic group reality”.

Part B) Compare and contrast explanations of ethnicity and ethnic relations given by these symbolic interactionist theorists: W.I. Thomas, G.H. Mead, Cooley, Park and Blumer.

Part C) Explain the following concepts: contact hypothesis, scapegoating theory and the normative approach. Watch the following video:

http://www.pbs.org/wgbh/pages/frontline/shows/divided/etc/view.html

(NOTE: you may have to type the above address into your browser.)

How are the concepts discussed in Part B illustrated in this video?