31. What is the central purpose of this passage?
(A) To critique standardized educational practices.
(B) To encourage the elimination of student grouping.
(C) To explain how differentiated instruction works.
(D) To promote the use of formative assessment.
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統計: A(0), B(0), C(23), D(1), E(0) #3473953
統計: A(0), B(0), C(23), D(1), E(0) #3473953