When you translate 4 units to the right, you must add 4 units to the x-coordinate; and when you translate 3 units down you must substract 3 units to the y-coordinate. Then if you translate a point P(x,y) 4 units right and 3 units down, the new coordinates of the point will be P'(x+4,y-3).
W(2,-3) → W'(2+4,-3-3) → W'(6,-6)
K(4,-3) → K'(4+4,-3-3) → K'(8,-6)
L(5,-2) → L'(5+4,-2-3) → L'(9,-5)
X(1,-2) → X'(1+4,-2-3) → X'(5,-5)
Answer: Third option: W'(6,-6), K'(8,-6), L'(9,-5) and X'( 5,-5)