ADMICRO

In these sentences, each one has four underlined words or phrases marked A, B, C, and D. Choose the one word or phrase that must be changed in order for the sentence to be correct by circling letter A, B, C, or D. 
Many (A) ethnic children(B) doesn't know how (C)to read and (D)write.

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ZUNIA12
ZUNIA9
AANETWORK