Shown below is a pair of linear equations.
mx + 4y - 6 = 0
ny - 12x + 12 = 0
For which of the following values of m and n do the above equations have infinitely many solutions?
A) m = -1 and n = 2
B) m = -1 and n = 3
C) m = 6 and n = -8
D) m = 6 and n = -2