The correct answer is:
C and D
Step-by-step explanation:
A regular hexagon has rotational symmetry every 60°. This is because there are 6 congruent angles, and 360/6 = 60°.
Turning this image 60° at a time, 1 turn will put A' on F. 2 turns, 120°, will put A' on E. 3 turns, 180°, will put A' on D. 4 turns, 240°, will put A' on C.
Since B' is right behind A', it will land on D when A' lands on C.