Quadrilateral [tex]WXYZ[/tex] is on a coordinate plane. Segment [tex]XY[/tex] is on the line [tex]x - y = -3[/tex], and segment [tex]WZ[/tex] is on the line [tex]x - y = 1[/tex].
Which statement proves how segments [tex]XY[/tex] and [tex]WZ[/tex] are related?
A. They have slopes that are opposite reciprocals of 1 and -1 and are, therefore, perpendicular.
B. They have the same slope of 1 and are, therefore, parallel.
C. They have slopes that are opposite reciprocals of 0 and undefined and are, therefore, perpendicular.
D. They have the same slope of -1 and are, therefore, parallel.