[单选题]
At what angle should a wateikww l*3ue w 8:fz4xe0r-gun ;wlfi pj1 x4tqmnqe+53 x*f-9clex 3 ybe aimed in order for the water to land with the greatest xn;lyq x1qetfm9 3ep*+-j 3c li f5x4whorizontal range?
A. $0^{\circ}$
B. $30^{\circ}$
C. $45^{\circ}$
D. $60^{\circ}$