Why does the author use the example of Samantha Cameron?

A、 To show that Samantha Cameron has a patch of worn skin and bony lumps on her big toes.
B、 To prove the point that high hels can cause muscular damage in onesfet
C、 To prove the point that high heels can make one's feet look more beautiful.
D、 To prove the point that high heels can make one's feet look less beautiful.