Select the main reason states are resistant to unfunded mandates.

A. Unfunded mandates are unconstitutional and states can refuse to follow them if they want

B. They must develop a program, without the necessary funding to properly support the program

C. States receive a lot of money to implement unfunded mandates, but have a hard time developing policy in their own

D. They just do not like the federal government's interference when they are supposed to have certain powers