[单选题]
A wave travels on a udo5p9i-,hux+x u h*g+ godgd0z4w97hd5xhb5 s-d ferope as shown, where $P$ is a point on the rope halfway between the equilibrium position and the maximum displacement.
Which is correct about the direction and magnitude of the velocity of point $P$ after half a period compared to the shown position?
A. Direction Up;Magnitude Increases
B. Direction Up;Magnitude Same
C. Direction down;Magnitude Decrease
D. Direction down;Magnitude Same
