This question is asking us to translate the statement into simpler terms. So. by asking us what answer choice is not a could be true, the correct answer is something that cannot be true, or must be false.
I think you may have interpreted this to be asking which of the four answer choices are not a can be true question- which is a reasonable interpretation. These drills are meant to help you to interpret a wired question stem (could be true except) into something that is more straightforward (cannot be true/must be false)
