Okay. Skew lines are a pair of lines that are neither intersect nor parallel to each other. Lines FG and DE do not intersect nor are parallel to each other, so they are skew lines. Score! But wait. Let’s check the others. AB and DC are parallel to each other, so B is eliminated. Same thing with C. The lines EF and DC are parallel as well. C is eliminated. CF and FG intersect, so D is out. No other answer fits. The answer is A.
