Post test: a natural balance
Which statement best summarizes the passage?
A. Over the years, people have invented cars that were powered by steam, density and gasoline with varying degrees of success.
B. The electric car, which has been around for over a century, has wined and grown in popularity at different times in history.
C. The invention of the electric car cannot be attributed to one person as many people had breakthroughs that led to electric vehicles.
D. The demand for electric vehicles continues to grow as people become more concerned about the costs of gas powered cars.