The marxist approach is often known as
a. the base-superstructure model.
b. materialism conception of history.
c. communist theory.
d. imperialist doctrine.

a. The base-superstructure model.

Explanation:

This conception states that all ideas and social institutions are the superstructure of  a material economic base. The social class that controls the means of production in each social system is the ruling class. The superstructure - ideas, currents of thought, culture - reflects the interests of the dominant class. In capitalism, the dominant class is the bourgoisie, the owners of factories (Marx saw and lived in the capitalism of the 19th century). This theory is also called dialectical materialism or historical materialism.

answer; ///i believe that the correct answer is (a) the great depression

letter a is the answer