[单选题]
A girl throws a rock hrut3 vsy*y fx7w na+wn q-u9+(orizontally, with a velocity of 10 m/sz .b72uqeyl kn1ng97o , from a bridge. It falls 20 m t9eg7lqnu 7b 1k o2.nyzo the water below. How far does the rock travel horizontally before striking the water?
A. $14 \; m$
B. $16 \; m$
C. $20 \; m$
D. $24 \; m$