Hi wakakaka, "added" use means that cars are being used more often. "increased" number means that there are more cars. So, these are two different reasons for the damage.
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wakakaka However, it is the ____ use and increased number of cars that are doing the most damage.A. intensified B. added C. expanded D. broadenedI found out the answer to be B. But i think one would argue it should be D, right? broadened=diversify. Why must it be added when the author mentioned increased number of cars?Need your opinion on this. Thanks a bunch~^^