Determine the Local Extrema of the Function $f(x, y)=x^{2}+y^{2}$ A) None
B)

Multiple Choice

Determine the local extrema of the function.
- $f(x, y) =x^{2}+y^{2}$

A) none
B) $\mathrm{f}(0,0) =0$ , maximum
C) $\mathrm{f}(1,1) =2$ , maximum
D) $f(0,0) =0$ , minimum