The equation of a wave on a string of linear mass density $$0.04 \text{ kg m}^{-1}$$ is given by $$y = 0.02(\text{m}) \sin\left[2\pi\left(\frac{t}{0.04(\text{s})} - \frac{x}{0.50(\text{m})}\right)\right]$$. The tension in the string is

A

$$4.0$$ N

B

$$12.5$$ N

C

$$0.5$$ N

D

$$6.25$$ N