Answer:
The frog's displacement would be 0, A.
Explanation:
Given: The frog begins at 0, moves 18 centimeters forward, moves 6 centimeters backward, and then 12 centimeters backward.
12+ 6 is 18, and if the frog moves back 18 (Which is the same distance is moved forward) then the frog did not move at all.
Displacement is the distance something or someone moved.