On the set of axes below, pentagon ABCDE is congruent to A"B"C"D"E". Which describes a sequence of rigid motions that maps ABCDE onto A"B"C"D"E"?

С

B

D

A. a rotation of 90° counterclockwise about the

origin followed by a reflection over the x-axis

B. a rotation of 90° counterclockwise about the

origin followed by a translation down 7 units

C. a reflection over the y-axis followed by a

reflection over the x-axis

D. a reflection over the x-axis followed by a

rotation of 90° counterclockwise about the

origin

А

E

D'

E

C

B

A