The Optimal Solution to the Nonlinear Model : Maximize $f(x)=5 X_{2}-30 X+50$

Multiple Choice

The optimal solution to the nonlinear model : Maximize: $f(x) =5 X_{2}-30 X+50$ , subject to $X^{3} 0$ and $X \pounds$ 4 , is given by $X$ equal to

A) 4
B) 0
C) 2
D) 1