Which of the following statements BEST explains the significance of Amendments IX and X?

A.
Amendments IX and X establish that rights that are not listed may still be held by the people and that power not held by the government are held by the States and people.

B.
Amendments IX and X are important because they suggest that the federal government may not always have the best interests of the States or the public at heart.

C.
Amendments IX and X acknowledge that the Constitution is not perfect and should be subject to (frequent) updating and change.

D.
Amendments IX and X are important because they give the States more powers than previously established.