A sinusoidal wave of frequency 40 Hz travels along a string where its speed is 8 m/s. Upon entering a second string in which the wave speed is 12 m/s, which statement about the wave in the second string is most consistent with wave behavior at a boundary?
(a) The frequency becomes 60Hz while the wavelength stays 0.20m.
(b) The frequency remains 40Hz while the wavelength increases.
(c) The frequency remains 40Hz while the wavelength decreases.
(d) The frequency decreases to 26.7Hz while the wavelength increases.