When barack obama was a presidential candidate, he argued that racial prejudice is one of america's defining social problems. he was implicitly acknowledging that: a. low-income women of all ethnicities see marriage as having few benefits. b. membership in socially constructed categories of race and ethnicity can affect people's life chances in many ways. c. race is constructed almost entirely in interaction. d. racism is driven by economic factors and any solution to racism will have to involved affirmative action?