Which of the Following Is an Example of Bilingual Education

Which of the following is an example of bilingual education in a U.S.school?

A) Ron's first language is English,and now he is taking a Spanish course in middle school.
B) Maria's first language is Spanish,so she has a teacher who speaks Spanish during some of her classes until Maria can learn more English.
C) Lynn's first language is English,and one of her teachers is speaking in Spanish sometimes during class so the children can learn a little Spanish.
D) Anibal's first language is Spanish,so he is taking a Spanish literature class taught in Spanish that follows his regular classes that are taught in English.