He killing of Osama Bin Laden and the USA Patriot Act is the answer to your question.
A series of trade restrictions introduced by Britain to impede American trade with France, a country with which Britain was at war;<span> the impressment of U.S. seamen into the Royal Navy, and you can find more reasons on google if you look up " causes of the war of 1812"</span>
The correct answer is - D. how to make iron.
The Zhou dynasty was one of the greatest dynasties of China, and among many achievements of their reign, the artisans of this dynasty managed to learn how to make iron. This was revolutionary for the Chinese people, and it was of great use in the agriculture after the tools for it started to come in iron version, and it made everything much easier, quicker, and more efficient.
