The CF is perpendicular and to the right of the wind in the northern hemisphere, to the left of the wind in the southern hemisphere.  A net inward force is needed to keep wind blowing in a circular trajectory.   Once you draw in the direction of the CF in each case you'll see that you end up with an inward pointing force in only (b) and (d).  Those would be possible, (a) and (c) are not possible if just the CF is present.