Question 4 2.5 pts What has happened to the real federal minimum wage in the US since the 1960's? O Though it rises periodically, it has largely been declining since the 1960's O Since every state has their own minimum wage, the federal minimum wage is not a useful topic of coversation O It has largely remained constant over that time period O Since it would be too politically controversial to lower the minimum wage, the federal realminimum wage has only been increased since the 1960's