Two Coherent Waves Interfere Constructively $8.00 I_{0}$ And the Other Has an Intensity Of

Two coherent waves interfere constructively. One wave has an intensity of $8.00 I_{0}$ and the other has an intensity of $4.00 I_{0}$ . What is the intensity of the superposed wave?

A) $23.3 I_{0}$
B) $8.00 I_{0}$
C) $12.0 I_{0}$
D) $4.00 I_{0}$
E) $24.0 I_{0}$