In the case of Muller versus Oregon in 1908, the Supreme Court ruled favoring Oregon. The ruling supports the claim that women are considered to belong in a special class of citizens that needs to be protected especially in the workplace.
16th ammendment 100% sure
The 16th Amendment dealt with the issue of how income tax funds would be apportioned. It allowed the Congress to levy income taxes without necessarily apportioning it to different states or even on the basis of the US Census.
This amendment was adopted in 1913. It exempted income taxes from the Constitutional Requirements of the United States of America.
Can be seen in the exchange of ideas and goods.
Pretty sure mapping best of luck