76. What can be inferred from the passage?
(A) The working class is more heterogeneous than the middle class.
(B) There is progression from managerial roles to petit bourgeoisie.
(C) Middle-class students are likely to have equal educational opportunities.
(D) There are different classification principles for horizontal distinctions.

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統計: A(9), B(13), C(29), D(70), E(0) #1317269