Individuals typically purchase a hybrid or electric vehicle in order to conserve the use of gasoline or other fossil fuels which power cars. By buying a car that doesn't require gasoline these consumers also seek to reduce their carbon footprint and impact on global warming by reducing their greenhouse gas emissions.
Endemic Species are -----------
( B ) species that are native to a particular place.
Look it up ok , but I think THE ANSWER IS A
Answer: to assure that the United States had access to trade with China.
The Open Door policy was issued by the United States in 1899-1900 as a series of dispatches from the US Secretary of State to other nations that had trading interests in China -- Great Britain, Germany, France, Italy, Japan, and Russia. The policy reasserted earlier agreements that all countries should have equal access to ports in China, with no favored "spheres of influence" for one nation or another. The United States was seeking to maintain an equal footing with other nations in the access to trade in China.