In 1900,the most commonly used source of energy in the United States was ________; today it is ________.
A) coal; oil
B) oil; natural gas
C) coal; natural gas
D) nuclear; hydrothermal

Question

In 1900,the most commonly used source of energy in the United States was ________; today it is ________. 
A) coal; oil 
B) oil; natural gas 
C) coal; natural gas 
D) nuclear; hydrothermal

Quizplus · Accepted Answer

The Answer of In 1900,the most commonly used source of energy in the United States was ________; today it is ________. 
A) coal; oil 
B) oil; natural gas 
C) coal; natural gas 
D) nuclear; hydrothermal

In 1900,the Most Commonly Used Source of Energy in the United