Well, that's the point of multi-level A/B testing. You try all of the combinations to isolate the impact of each varying feature, but you are always testing 'wh

Well, that's the point of multi-level A/B testing. You try all of the combinations to isolate the impact of each varying feature, but you are always testing 'wholistically'. They don't just throw a green bar up there on its own and see who clicks on it.