[单选题]
If it takes 50 m to stop a 9/ v 5 x7jyettio,nhk4car initially moving atvrl r ;sy9q7j::by xh)a wii8lm q))4r 25 m/s, what distance is required to stop a car moving at 50 msxra yjmb7 qiw)qy;rl : i98r4: )v)hl/s under the same condition?
A. $50 \; m$
B. $100 \; m$
C. $200 \; m$
D. $400 \; m$
