Both democratic and republican parties would support the idea that the united states should a. share the use of nuclear power b. reduce production of coal and oil c. ensure environmentally safe drilling d. develop independent energy sources

The correct option is D.
Both the republicans and the democrats support the idea that the United States of America should develop independent energy sources. 
The country depends on other countries for the supply of crude oil, this put the nation in a vulnerable position. Apart from crude oil, there are many other resources that are available in USA from which power can be generated. Harnessing these resources will make the country less dependent on other countries and will also make them to have varied power sources.