Simplify x ^ 0 * y * z ^ - 3 x/(y * z ^ 3) 1/(y * z ^ 3) y/(z ^ 3) (xy)/(z ^ 3) please help !

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv