What does the statement "If the exterior sides of two adjacent acute angles are perpendicular, then the angles are complementary" imply?
A) If two angles are complementary, their exterior sides are perpendicular.
B) If the exterior sides of two adjacent acute angles are perpendicular, then the angles are supplementary.
C) If two angles are supplementary, their exterior sides are perpendicular.
D) If the exterior sides of two adjacent acute angles are perpendicular, then the angles are congruent.