[单选题]
03.10: A ball is throw9-8pni ymkq0hsbr 0zz (hjgx-;+fr x2n into te0yt 8fi(w 41wpedx*zfyyv29 he air at an angle $\theta$ as measured from the horizontal with a velocity $v$. The horizontal velocity of the ball will be directly proportional to which of the following
A. $\theta$
B. $\sin{\theta}$
C. $\cos{\theta}$
D. $\tan{\theta}$
E. $g$
