Of the 8 specific limitations on Congress' powers contained within Article 1, section 9, what are the two most important and why?
a) No ex post facto laws and no bills of attainder; to protect individuals from unfair laws
b) No suspension of habeas corpus and no export taxes; to protect civil liberties and trade
c) No titles of nobility and no religious tests; to ensure equality and religious freedom
d) No interference with state treaties and no income taxes; to preserve state autonomy and financial privacy