Iron Joseph Paxton design the crystal palace
Sumer had a surplus of "food", due to the fact that they were an agrarian outcome of the Neolithic Revolution. This meant that people could focus on other activities besides farming. <span />
B is the correct answer.
The Supreme Court hears very few of the cases that are brought to it. The Justices decide amongst themselves which cases they will grant an writ of certiorari to, giving them an audience in front of the court. No other group may tell the Supreme Court what cases to hear.
Nuclear weapons technology was developed during the Cold War, which makes it possible to launch missiles across vast distances and wage wars that create exponentially more damage than before.