Question

a(x) = 3x - 7 b(x) = x + 15 \large c\left(x\right)=\sqrt{x-8} \large d\left(x\right)=\left|x+3\right| f(x) = x + 1

g(x) = x2 + 6x + 4 h(x) = x3 - 7

What is d(c(12))?

a
51
b
9
c
-5
d
5