One involved a guy who stopped too suddently , flipped his bike and impaled his abdomen on one side of the handle bars and breaks . Another guy also stopped too suddenly , but this time the bike ripped a hole from his groin down to his knee so that his muscle was hanging out . Then one more ( the last one , I promise ) , a girl accidently just used her front breaks so she flew over the handle bars and knocked out all her front teeth . Apparently its on you tube if you 're curious , its called the Toothless Wonder I think .

Based on the preceding passage, choose your answer for question Why might it not be a good idea to stop too suddenly while riding a bike ?
Select from the following.
a). The bike may not stop and you can run into another vehicle .
b). None of the above choices .
c). The bike might flip backwards and knock our your front teeth .
d). A person may flip over the handlebars when the vehicle halts too abruptly .
The answer is:
d).