it is either b or c due to the fact that (0, 3) is on the graph, and since the frequency is 3, the period is 1/3, and since it is 2pi/(the coefficient of x inside the sin function), then only \(\boxed{B}\) satiesfies it, because the coefficient is 6pi, and you get 2pi/6pi or 1/3.
HOPE THIS HELPED!