GMAT Critical Reasoning (CR) | Re: Rifka: We do not need to stop

Rifka: We do not need to stop and ask for directions. We would not need to do that unless, of course, we were lost.
Craig: The fact that we are lost is precisely why we need to stop.
In the exchange above, the function of Craig’s comment is to

(A) contradict the conclusion of Rifka’s argument without offering any reason to reject any of Rifka’s implicit premises
(B) deny one of Rifka’s implicit premises and thereby arrive at a different conclusion
(C) imply that Rifka’s argument