[单选题]
At what angle should dx) *zln ,z uqmrb eddcl .cg0+55:n6eaj vzz4udr-0l7u ax1b( water-gun be aimed in order for the water to land with the greatest ho x 71u4ldzv0-r(bjau zrizontal range?
A. $0^{\circ}$
B. $30^{\circ}$
C. $45^{\circ}$
D. $60^{\circ}$
