What is a scientific Question?

A - can cats learn to sit down on command

B-why do black cats bring bad luck?

C - are spotted cats cuter than solid colored cats?

D - why are Persian cats so funny?

I think that the best answer would be A because it involves how they learn or how do their brains function, therefore can be answered by a Scientist. Choice B can be theories about how can a black cat can bring bad luck. Choice C can be defined real quick just by researching where do spotted cats genes come from. And finally choice D can be also a theoretical question.