a confused CR question

ca3ltoys

a question from Master the GMAT 2004-ARCO

Mary: All of the graduates from Midland High School go to State College.
Ann: I don't know, some of the students at State College come from North Hills High School.

Ann's response shows that she has interpreted Mary's remark to mean that
(A) most of the students frm North Hills High School attend State College
(B) none of the students at State College are from Midland High School
(C) only students from Midland High School attend State College
(D) Midland High School is a better school than North Hills High School
(E) some Midland High School graduates do not attend college

kind veterans please help me to interprete it .

littlegirl

C

anchoret

what option do you want to choose?

ca3ltoys

I am not sure. While the best answer sure is C.

alwaysloos

B