The amplitude of a wave disturbance propagating in the positive x-direction is given by `y = (1)/((1 + x))^(2)` at time `t = 0` and by `y = (1)/([1+(x - 1)^(2)])` at `t = 2 seconds`, `x and y` are in meters. The shape of the wave disturbance does not change during the propagation. The velocity of the wave is ............... m//s`.

Options

A. `v=1 ms^(-1)`
B. `(1)/(2)ms^(-1)`
C. `y=(1)/(1+(2-x)^(2))`
D. `y=(1)/(1+(4-x)^(2))`