You can find the value of 6 in your given number by setting the other digits to zero. It is
... 60,000
This is 10 times 6,000, so you're looking for a number that is equal to 6,000 when all other (non-6) digits are set to zero.
A. 06,000 ⇔ the number you are looking for
B. 060,000
C. 600,000
D. 000,600
The appropriate selection is A. 56,831.