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 $r = 4$ . Select the correct answer.

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