By carefully researching the lives of african americans in a predominantly black neighborhood of philadelphia, w. e. b. du bois demonstrated that shaped every aspect of the lives of african americans.

W. E. B. Du Bois demonstrated that limited opportunities and racism shaped every aspect of the lives of African Americans. Africans were discriminated against in various spheres and as a result were limited in the extent they could advance themselves

montesquieu took the view that the roman republic had powers separated so that no one could usurp complete power. in the british constitutional system, montesquieu discerned a separation of powers among the monarch, parliament, and the courts of law.

the correct answer is d