For a checkerboard with size m x n (m rows, n columns), and orange squares positioned to fill each square, how can the x, y coordinates of the orange squares be calculated based on the square number i?
A) $f(i) = (i \mod m, i \div m)$
B) $f(i) = (i \div n, i \mod n)$
C) $f(i) = (i \div m, i \mod n)$
D) $f(i) = (i \mod n, i \div m)$
