Solve the Linear System of Equations for K, M, and N

Multiple Choice

Solve the linear system of equations for k, m, and n.
-6k - 3m + 4n = -21
-4k + 5m - 2n = -21
-3k - 8m - 8n = -47

A) (1, 5, 3)
B) (3, 1, 5)
C) (5, 1, 3)
D) (5, 3, 1)