One Model for Expenditures at High Schools Gives the Cost

Multiple Choice

One model for expenditures at high schools gives the cost C, in dollars per pupil, as a function of the number n of students enrolled.The relationship is . ​
Find the enrollment and cost that correspond to the minimum cost per pupil.Round your answers to the nearest whole number.

A) An enrollment of 1909 gives a minimum cost of $340 per pupil.
B) An enrollment of 340 gives a minimum cost of $1909 per pupil.
C) An enrollment of 1911 gives a minimum cost of $344 per pupil.
D) An enrollment of 344 gives a minimum cost of $1911 per pupil.