Two Sound Waves,one Wave Is Given by Y₁ = P_o $\omega$

Multiple Choice

Two sound waves,one wave is given by y₁ = p_o sin ( $\omega$ ₁t) ,and the other by y₂ = p_o sin ( $\omega$ ₂t) ,where $\omega$ ₁ differs from $\omega$ ₂ by a rad/s.The maximum sound intensity of the beat frequency is

A) p_o²
B) 2p_o²
C) 4p_o²
D) 8p_o²
E) 0