Write the inverse of the conditional statement.
"If a polygon is regular, then it has congruent angles and congruent sides".
a. If a polygon has congruent angles and congruent sides, then it is regular.
b. If a polygon does not have congruent angles and congruent sides, then it is not regular.
c. A polygon has congruent angles and congruent sides, if and only if, it is regular.
d. If a polygon is not regular, then it does not have congruent angles and congruent sides.