The speed of high-speed train is approximately $$350$$ kilometres per hour, which is approximately $$100$$ metres per second. So its speed is roughly $$20$$ times faster than $$5$$ metres per second. 
The speed of high-speed train is approximately $$350$$ kilometres per hour, while the walking speed of a person is approximately $$5$$ metres per second.  Approximately, how many times is the speed of a high-speed train faster than the walking speed of a person?． 

A. $$2 $$ 
B. $$20 $$ 
C. $$70 $$ 
D. $$200 $$ 
E. $$700$$ 