Today, the Ninth Amendment is used mainly to stop the government from expanding their power rather than just limiting their power.
The action that would violate the Ninth Amendment would be:
d) Obtaining unauthorized personal information from a website.
The 9th amendment means that even if a right is not specifically mentioned in the Constitution, it still belongs to the people. For example, in this case, the right to privacy. It's not specifically mentioned in the Constitution, but it is still a right that the government cannot take away.
