4. Which of the following statements is incorrect? ( ).
( A ) On the number line, two rational numbers corresponding to two points symmetric about the origin are opposites of each other.
(B) If two rational numbers are opposites of each other, then the two points corresponding to them on the number line are symmetric about the origin.
( C) If two rational numbers are not equal, then their absolute values are not equal.
(D) If the absolute values of two rational numbers are not equal, then the two rational numbers are not equal.