wilslm

Sorry, missed the “not correct” part. C is right. You should check against the Schweser errata, but even if they don’t have it in there, you’re right.
BTW, why do you think A is also the answer? Maybe because it is missing the “nonstationary” portion, but that would really make this question weird. Which won’t be surprising since I have seen Schweser give wrong answers/explanations elsewhere.