In the middle of the Indian Ocean, the tsunami referred to in the passage was a train of pulses approximating a sinusoidal wave with speed \(200 \mathrm{~m} / \mathrm{s}\) and wavelength \(150 \mathrm{~km}\). What was the approximate period of these pulses?

A. \(1 \mathrm{~min}\)

B. \(3 \mathrm{~min}\)

C. \(5 \mathrm{~min}\)

D. \(15 \mathrm{~min}\)