Jerome found the lengths of each side of triangle QRS as shown, but did not simplify his answers. Simplify the lengths of each side to answer the question.

Which statement about triangle QRS is true?

Triangle QRS is an equilateral triangle because QR = RS.

Triangle QRS is an isosceles triangle because QR = QS.

Triangle QRS is a scalene triangle because all sides have different lengths.

Triangle QRS is an isosceles triangle because QR = RS.