Proponents of bilingual education argue that it:

a. maintains cultural boundaries that are important to social order.

b. identifies the immigrant and foreign national children to authorities.

c. eases the transition of non-English-speaking children into the all-English mainstream.

d. helps identify immigrants with better aptitude. insures people get jobs after school.

c. eases the transition of non-English-speaking children into the all-English mainstream.

Explanation:

Proponents of bilingual education believe that when non-English speaking students are educated in both their native language and English, they're able to learn and speak English is greatly enhanced; they learn English in a more efficient manner and they're able to continue learning core subjects (math, history etc).

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which sentences ? that question is incomplete