Use the graph to answer the question.
Which has been the primary source of energy in the most recent century?
A. Wood and nuclear
B. Hydroelectric and other renewables
C. Petroleum, natural gas, and coal
D. Wood and coal
Which has been the primary source of energy in the most recent century?
A. Wood and nuclear
B. Hydroelectric and other renewables
C. Petroleum, natural gas, and coal
D. Wood and coal