Learning a foreign language is quite necessary for all of the students

28. Learning a foreign language is quite necessary for all of the students.
A. It's quite necessary for all of the students learning a foreign language.
B. It's quite necessary for all of the students being learning a foreign language.
C. It's quite necessary for all of the students to learn a foreign language.
for all of the students to be learn a foreign
language.
D. It's quite necessary for all of the student to be a foreign language