if two lines in a plane are cut by a transversal to form congruent corresponding angles, then the lines are parallel, (option A)
Step-by-step explanation:
For two lines to be parallel:
1) A transversal line will cut the two lines, thereby making the interior angles on both sides of the transversal line supplementary
2) A transversal line will cut the two lines, such that the corresponding angles will be equal(congruent).
From the options, the correct one:
if two lines in a plane are cut by a transversal to form congruent corresponding angles, then the lines are parallel, (option A)