Margaery, who is constantly obsessing about her neighbor’s new things, is plagued with bad dreams. which of the four noble truths is she experiencing?

I believe the answer is: cause of suffering

In Buddhism's four noble truths, cause of suffering is caused by craving or lust which remain unfulfilled (usually worldly pleasures) which cause a person to be obsessed toward obtaining that lust. This could be seen in someone who is obsessing of other people's wealth, position,talent or lovers.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

they both built pyramids.