[单选题]
A girl throws a rockzds.7cl pb .c/ horizontally, with a velbe9 tzt80zu i5ocity of 10 m/s, from a bridge. It falls 20 m to the water bitb5z te z8u09elow. How far does the rock travel horizontally before striking the water?
A. $12.12 \; m$
B. $16.16 \; m$
C. $20.2 \; m$
D. $24.24 \; m$