If z is a multiple of 7899, what is the remainder when z^2 is divided by 9?
Choose the correct choice from the following answers.
A) 0	B) 2	C) 3	D) 6	E) 7
The sum of the digits is 7+8+9+9= 
<gadget id="calculator">7+8+9+9</gadget>
<output>33</output>
33.   Thus 3 is a factor of 7899, so 3 is a factor of z.   Then 3^3= 9 is a factor of z^2.   Then the remainder when z^2 is divided by 9 is 0.   The answer is 0.
<result>A</result>
If z is a multiple of 7899, what is the remainder when z^2 is divided by 9?