Two Harmonic Waves Are Described By $y_{1}=(7 m) \sin \left(\frac{5}{m} x-\frac{100}{s} t\right)$

Multiple Choice

Two harmonic waves are described by: $y_{1}=(7 m) \sin \left(\frac{5}{m} x-\frac{100}{s} t\right)$ $y_{2}=(7 \mathrm{~m}) \sin \left(\frac{5}{\mathrm{~m}} x-\frac{100}{\mathrm{~s}} t+2\right)$ What is the phase (in rad) of the resultant wave when x = t = 0?

A) 3
B) 0
C) 2
D) 1
E) 4