The answer is the option B. rotate 90 degrees counterclokwise and then rotate 270 degrees counterclockwise.
See that two consecutive rotations counterclockwise are equivalent to one single roration counterclockwise as long as the angles sum up the same.
Given that 90° + 270 ° = 360° means that the two rotaions are equivalent to one 360° rotation, and so the final figure will be the same as the original figure.
