New sources of energy are constantly being looked for A. although fossil fuels continue to dwindle B. fossil fuels continuing to dwindle C. so that we continue to reduce fossil f
New sources of energy are constantly being looked for _______.
A. although fossil fuels continue to dwindle
B. fossil fuels continuing to dwindle
C. so that we continue to reduce fossil fuels
D. as fossil fuels continue to dwindle