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