Two coplanar lines that are perpendicular to the same line are parallel.
a.) always
b.) sometimes
c.) never

Coplanar lines are lines that lie on the same plane.

Theorem: If two coplanar lines are perpendicular to the same  line, then the two lines are parallel to each other.

This theorem is true always, therefore, given statement is true always.

correct choice is A

option: d is correct

step-by-step explanation:

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