Using paper folding to construct a line perpendicular to a given line through a point fold the paper through the point so that the given line segment lies:
a. perpendicular to the paper's edge
b. on the point
c. at an angle
d. upon itself

Correct D. Upon Itself
A line segment has an angle that is exactly 180°. As perpendicular lines are lines meeting at the right angle, or 90°. If we then use paper folding to construct a line perpendicular to a given line, the given line should be directly above each other once folded.

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