Wave 1 Has Amplitude Of $9.0 A_{0}$ And Wave 2 Has Amplitude

Multiple Choice

Wave 1 has amplitude of $9.0 A_{0}$ and wave 2 has amplitude $4.0 A_{0}$ . What is the ratio of their intensities, $I_{1} / I_{2}$ ?

A) 5.1
B) 1.3
C) 2.3
D) 1.5
E) 20