Holly wrote the statement Polygon RSTUV is regular if it has congruent sides and congruent angles. Which statements are true regarding her work? Select three options. A) The hypothesis of the statement is "if it has congruent sides and congruent angles." B) The conclusion of the statement is "Polygon RSTUV is regular." C) An equivalent statement is "If polygon RSTUV has congruent sides, then it has congruent angles." D) The statement cannot be proven true or false. E) It is a conditional statement.