Answer:
to better understand and appreciate their heritage
Explanation:
In the last line of the excerpt he wants these artists to "cause the smug Negro middle class to turn from their white, respectable, ordinary books and papers to catch a glimmer of their won beauty." In this line "their own beauty" is the heritage of African Americans. The "near intellectuals" aren't musicians and writers. They are African Americans who are paying attention more to white culture than their own history.
The correct answer is b. people who gather census information
Even though enumerators might have made mistakes the data sticks, and the enumerators are people who collect the data about the census.
God is presented as being all-powerful and all-knowing, aware of all the shortcomings and misdeeds of humanity as a whole and of every individual person.
I believe the centrifuge "flings" things in both directions, because the process of a centrifuge is to separate fluids.