A 90° counterclockwise rotation about the origin, and then a reflection across the x-axis performed on shape I proves that shape II is congruent to shape I. Which other sequences of transformations on shape I can also be
used to prove congruence to shape II?

a reflection across the y-axis and a 90° clockwise rotation about the origin
a 90° counterclockwise rotation about the origin and a reflection across the y-axis
a reflection across the y-axis and a 90° counterclockwise rotation about the origin
a 90° clockwise rotation about the origin and a reflection across the x-axis
a reflection across the x-axis and a 90° clockwise rotation about the origin