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Lines A and B are parallel. Which of the following statements are true about these two lines? Select ALL that apply.

Lines A and B never touch.

Lines A and B can be the same line.

Lines A and B touch at one point.

Lines A and B intersect at a 90$^\circ$ angle.

Lines A and B have the same slope,

The slope of line A is the negative reciprocal of the slope of line B.