Based on the pattern of the drawings, which conjectureis reasonable to make?When a pair of parallel lines is intersected by a thirdline, the alternate exterior angles are congruent.When a pair of parallel lines are intersected by athird line, the alternate exterior angles aresupplementary.When a pair of parallel lines is intersected by a thirdline, the alternate exterior angles are obtuse.When a pair of parallel lines is intersected by a thirdline, all of the angles formed are congruent.