Sara draws three pairs of parallel lines with a 3rd line intersecting each pair. she measures some pairs of alternate exterior angles as shown. what is a reasonable conjecture for sara to make by recognizing a pattern and using inductive reasoning? a) when a pair of parallel lines are intersected by a third line, alternate exterior angles are supplementary. b) when a pair of parallel lines are intersected by a third line, alternate exterior angles are acute. c) when a pair of parallel lines are intersected by a third line, alternate exterior angles are congruent. d) when a pair of parallel lines are intersected by a third line, alternate exterior angles are complementary