Question

The image of ABC is A'B'C. What transformations would result in this image?

∨ABC is reflected over the line x = 1, then is rotated -90° around the origin.
∨ABC is reflected over the line y = x - 1, then T: (x, y) → (x - 1, y - 1).
∨ABC is rotated 90° around the origin, then is reflected over the y-axis.
∨ABC is rotated -90° around the origin, then is reflected over the line y = -1.