Yes I believe so, the OSHA rules under employer responsibilities imply nothing against that.
The answer to your question is BOTH A AND B
That statement is true
The purpose of minimum wages is to make sure that every worker in united states (who worked at least 40 days a week) have enough resource to at least sustain the living of their family. So in cases of contradictory occurrence like this, the highest minimum wage will be used over the lower ones
Could you please provide an image along with this question to make it a little more clearer?
Thanks