Variable a Is Measured on an Interval Scale with Values

Multiple Choice

Variable A is measured on an interval scale with values that range from 0 to 10. Which of the following statements must be true?

A) The value 0 represents the complete absence of variable A.
B) The value 8 represents twice the amount of variable A as does the value 4.
C) The difference in the amount of A from 2 to 3 is the same as the difference from 6 to7.
D) All the above statements are true.