Which of the Following Are True About the ROUND Function

Which of the following are true about the ROUND function?

A)
If the number of digits argument is greater than 0 (zero) ,then the number is rounded to the specified number of digits to the right of the decimal point.
B)
If the number of digits argument is equal to 0 (zero) ,then the number is rounded to the nearest integer.
C)
If the number of digits argument is not included,then the number is rounded to 10 times the current value.
D)
If the number of digits argument is less than 0 (zero) ,then the number is rounded to the specified number of digits to the left of the decimal point.