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.