There were 2 main changes.
Firstly, the Civil War established that the King could not rule without the consent of Parliament, particularly in regard to raising taxes.
Secondly, it was recognized that the king needed a sufficient income to "live off his own" in order to prevent his dissolving parliament and ruling by decree, especially in order to raise money through unagreed new taxes.
The answer is D. The tax is levied on something other than income but ends up being a higher percentage of their income than it would be for a high earner.
Answer: in the words of Thanos "a small price to pay for salvation" I mean when the south lost the civil war it allowed the slaves to be set freed if the south would've won there would be slaves to this day