Which words belong, in the correct order, in the two blanks in the statement below to make it true?

Two lines are ______ if and only if they lie in the same plane and do not intersect, and two lines are ______ if and only if they lie in the same plane and intersect at right angles.

A.
perpendicular, parallel

B.
perpendicular, bisectors

C.
parallel, bisectors

D.
parallel, perpendicular