2. Who are the ultimate "deciders" of what's Constitutional? In other words, who has the last word on whether laws follow the Constitution?

The Supreme Court and the justices therein are the "deciders" of whether or not a law is constitutional. They define and convey the meaning of the U.S. Constitution.

Explanation:

Of the three branches, executive, legislative, and judicial, the Supreme Court is the top of the Judicial branch and the job given to them is understanding the Constitution.

1) she is extremely upset

nations must cooperate to bring about and maintain world peace.

nations must not wage wars or commit war crimes in a desire to control other nations.

i think i know which options you have but if these aren't options let me know