In United States, one reason in developing the alternative energy sources is the <u>B. unsteady politics in foreign countries</u>.
The United States is the world's second most power-hungry (consumer) nation after China. The United States needs the power to run itself and so it doesn't compromise on importing the fuel needed to generate this power from other countries.
But lately, the destabilized political conditions in the countries that the United States imports most of its fuels from have made it mandatory for the United States sustainable alternative energy resources.
Answer: Italy surrendered to US and British forces.
Germany and Italy were the original European members of the Axis powers and even though Germany had to keep saving Italy on account of the Italian military being weak, they were still a very important ally to Germany.
After defeating Hitler in Germany, the Allies invaded Europe through Italy and as they fought on, the Italians removed their leader Mussolini and surrendered to the U.S. and British Forces. Germany however invaded the northern part of the country and a very slow struggle to defeat the Germans ensued.