A wave travelling along the x-axis is described by the equation y(x, t) = 0.005 cos (`alpha x - betat`). If the wavelength and the time period of the wave are 0.08 m and 2.0 s, respectively, then a and p in appropriate units are

Options

A. `alpha=frac(0.08)(pi), beta=frac(2.0)(pi)`
B. `alpha=frac(0.04)(pi), beta=frac(1.0)(pi)`
C. `alpha=12.50pi, beta=frac(pi)(2.0)`
D. `alpha=25.00 pi, beta=pi`