The effect of the 16th Amendment was that b) It granted Congress the
power to tax incomes. The 16th Amendment to the United States
Constitution allowed Congress to levy taxes without apportioning it to
that specific state or basing it on the United States Census
(apportioning it to the state and according to their respective numbers)
and this included all taxes except income tax.
The answer is 4. Someone may disagree that this was his major accomplishment. And the other options are stated as fact
There was the National Woman Suffrage Association and the American Woman Suffrage Association. The National Association immediately went to campaigning for universal suffrage. The American Association focused on more of a state-by-state basis. They worried that tying women's suffrage, which was extremely unpopular, would hurt the black suffrage movement that was just starting.
From what I can remember, states' rights was a large factor contributing to the Civil War. With Lincoln becoming president and representing the North, the Southern states seceded, leading to a war. The state governments of the South argued that since the Constitution and federal government was created by the states, the federal government had no right to stop states from seceding. President Lincoln and other northerners disagreed and wanted to preserve the Union by stopping states from seceding.
After the war, I believe the South still disagreed on a strong federal government. They wanted to rule the area by themselves.