Why Is the Tenth Amendment to the US Constitution Controversial

Why is the Tenth Amendment to the US Constitution controversial?

A) There have been instances of apparent federal overreach into what was considered to be a power of the states, such as the issue of slavery and taxation .
B) The states believe the Tenth Amendment limits the federal government's power to protect them .
C) The federal government is burdened with too much responsibility and uses the Tenth Amendment to give more responsibility to states .
D) The states use the Tenth Amendment to rely on the federal government intervening in interstate conflicts .
E) The Tenth Amendment has not been particularly controversial in the United States .