Which transformation sequence results in the identity transformation?
Reflect over xxx-axis, then reflect over yyy-axis
Rotate 90∘90^\circ90∘ CCW, then rotate 90∘90^\circ90∘ CCW
Reflect over the line y=xy=xy=x, then reflect over y=xy=xy=x
Translate by ⟨2,3⟩\langle 2, 3 \rangle⟨2,3⟩, then translate by ⟨2,3⟩\langle 2, 3 \rangle⟨2,3⟩