A point source of sound lies at the origin. The displacement equation of the sound wave traveling along the positive x-axis is given by?
Options:
A) y = y₀ sin(kx - wt)
B) y = y₀ sin(kx + wt)
C) y = y₀ cos(kx - wt)
D) y = y₀ cos(kx + wt)