Select all the conditionals that have a true converse.
A. If a quadrilateral is a square, then it has four congruent sides.
B. If a polygon is a triangle, then it has 3 sides.
C. If a quadrilateral is a rectangle, then it has two pairs of parallel sides.
D. If two angles are congruent, then they have the same measure.
E. If two angles are complimentary, then the sum of the measures of the angles is 90.