$A$ $50 \;kg$ girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter $1.0 \;cm$. What is the pressure exerted by the heel on the horizontal floor?

• A
  $1.95 \times 10^{7} \;N m^{-2}$
• B
  $8.62 \times 10^{5} \;N m^{-2}$
• C
  $2.65 \times 10^{5} \;N m^{-2}$
• D
  $6.24 \times 10^{6} \;N m^{-2}$