What Are the Wavelength (In Meters) and Frequency (In Hertz) $0.20 \mathrm {~m} , 120 \sqrt { 2 \pi } \mathrm { Hz }$

Multiple Choice

What are the wavelength (in meters) and frequency (in hertz) of a wave whose displacement is given by the equation y=0.5 sin (0.20 x+120 t) , where x and y are in meters and t is in seconds?

A) 19 m, 120 Hz
B) 5.0 m, 10 Hz
C) $0.20 \mathrm {~m} , 120 \sqrt { 2 \pi } \mathrm { Hz }$
D) 10 m, 0.50 Hz
E) 31 m, 19 Hz