19. In the context of this passage, what does cognitive refer to when discussing the benefits of bilingual education?
(A) emotional well-being.
(B) physical health improvements.
(C) mental processes like problem-solving and flexibility.
(D) enhancement in social skills.
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統計: A(1), B(0), C(77), D(5), E(0) #3262345
統計: A(1), B(0), C(77), D(5), E(0) #3262345