Multiply, Then Simplify the Product $(3+\sqrt{3})^{2}$ A) $6+6 \sqrt{3}$ B) $12+6 \sqrt{3}$ C) $9+6 \sqrt{3}$

Multiple Choice

Multiply, then simplify the product. Assume that all variables represent positive real numbers.
- $(3+\sqrt{3}) ^{2}$

A) $6+6 \sqrt{3}$
B) $12+6 \sqrt{3}$
C) $9+6 \sqrt{3}$
D) $12+3 \sqrt{3}$