What roles do race and social class continue to play in the united state

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Explanation:

Race has to do with your skin color and how people look at you because of your skin color and social class deals more with your wealth and money determines your place in society  

i think the correct answer is b) humans who reduce their calorie intake by at least 25 percent on a long-term basis will live longer than they would have they not done so. i hope i you out