Part of the proposed increase in state education spending is due to higher enrollment, since the number of students in public schools have grown steadily since the mid-1980's and, at nearly 47 million, are at a record high.

A. enrollment, since the number of students in public schools have grown steadily
since the mid-1980's and, at nearly 47 million, are at

B. Enrollment, with a number of students in public schools growing steadily
since the mid-1980's and, at nearly 47 million, reaching.

C. Enrollment: since students in public schools have grown steadily in number
since the mid-1980's and, at nearly 47 million, have reached.

D. Enrollment: the number of students in public schools has grown steadily since
the mid-1980's and, at nearly 47 million, has reached.

E. Enrollment: students in public schools have grown steadily in number since
the mid-1980's and , at nearly 47million, are at