Is It Possible to Provide a Reliable Ratio Between Two

Is it possible to provide a reliable ratio between two classes if we don't know how many members are in each?

A) Yes, because if we don't know how many members each class has, we can assume that they are approximately the same size.
B) Yes, because we could extrapolate a ratio from the ratio we find in a large sample.
C) No, because we have to know how many members there are in at least one of the classes.
D) No, because we have no basis for calculating a ratio unless we know how many members are in both classes.
E) No, because in that case, we couldn't provide any statistics about the two classes at all.