Let $n=\sum_{r=0}^{10}(-1)^r{ }^{10} C_r\left(\frac{2}{3}\right)^{2 r} 3^{20}$. Which one of the following statements is TRUE?

• Correct answer
  A

  $\quad n$ is divisible by 5
• B

  $\quad n$ is divisible by 6
• C

  $\quad n$ is divisible by 8
• D

  $\quad n$ is divisible by 9

Hence, the correct answer is option: 'A'.