$A$ is an impossible event. $C$ is an impossible event. $D$ is a random event. 
Which of the following statements is a certain event? 
Options:
  $3$ is a factor of $98765$. 
  The sum of the interior angles of a triangle is $180$°. 
  The age difference between Michael and Candy will increase in $10$ years. 
  Choose a $3$-digit number and it can be divided by $9$ without any remainder. 