Answer: Choice B
Reason
Plug x = 0 into f(x) to find that f(0) = 1.
It will mean the point (0,1) is on the f(x) curve.
The corresponding point on g(x) is (0,-3)
To go from (0,1) to (0,-3) we move down 4 units.
That's why there's a -4 at the end of the answer. I recommend using a graphing tool like Desmos or GeoGebra to confirm the answer is correct.