Find the Smallest Possible Area of an Isosceles Triangle That $r=4$

Multiple Choice

Find the smallest possible area of an isosceles triangle that is circumscribed about a circle of radius $r=4$ .

A) $4 \pi \sqrt{3}$
B) $4 \sqrt{3}$
C) $48 \sqrt{3}$
D) $\sqrt{3}$
E) $\sqrt{48} r^{2}$