Which of the statements about the x-axis are true?
1. The x-axis intersects the y-axis at the origin.
II. The x-axis is a vertical number line that passes through the origin.
III. The x-axis is the second coordinate in an ordered pair that describes the horizontal distance from the origin.
IV. The x-axis is a horizontal number line that passes through the origin.
A. I and II
B. IV only
C. lll only
D. I and IV
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