Let $w = ( x + 2 y + 3 z ) ^ { 4 }$

Multiple Choice

Let $w = ( x + 2 y + 3 z ) ^ { 4 }$ , where x = s + t, y = s - t, z = st. When s = 0, t = 1, $w _ { t }$ is

A) $- 16$
B) $- 24$
C) 12
D) 4
E) $- 1$