Hey there!
The correct answer would be the second choice, a translation up.
The reason for this answer is, if you compare the before translation image, WXYZ, and the after image, W'X'Y'Z', W'X'Y'Z is the same exact image of WXYZ except it has moved up 4 units.
The first choice would be incorrect since if you were to rotate the image 90 degrees about point B, the final image would lie off the graph and face sideways, which is clearly not how the image W'X'Y'Z' resulted.
The third choice would be incorrect since if WXYZ was reflected over line a, your point, X, would lay on the point (1,-1) rather than on (1,-3) like in W'X'Y'Z'.
And finally, the fourth answer would be incorrect since if WXYZ were to be rotated 180 degrees about point B, then your figure would be the reverse image of W'X'Y'Z'.
Hope this helps and have a marvelous day! :)
