I believe your answer is D- Oil.
C. Viking raiders and armed bands threatened everyone, but kings had lost power and could not protect everyone. Under the feudal system, nobles could protect their property and local people by offering land in exchange for loyalty and military service.
What story are we talking about? theres no picture
The Kyoto Treaty does not undermine the United States sovereignty because it does not have anything to do with such. It was a treaty that asks committing State parties to reduce greenhouse gas emissions because global warming does exist and it is caused by CO2 productions done by human activities.
