Multiply
- $\left(9 y^{2}-4\right)\left(9 y^{2}+4\right)$ A) $81 y^{4}-72 y^{2}+72$ B) $9 y^{2}-16$ C) $81 y^{4}-16$

Multiple Choice

Multiply.
- $\left(9 y^{2}-4\right) \left(9 y^{2}+4\right)$

A) $81 y^{4}-72 y^{2}+72$
B) $9 y^{2}-16$
C) $81 y^{4}-16$
D) $81 y^{2}+16$