单选题
What is said about cell phone use in the mid-1980s in paragraph 5?
A、
It had a life-taking effect because there weren't enough cell phones in use then.
B、
The increased use of cell phones then caused a "life-taking effect."
C、
Traffic fatalities increased then because the number of cell phones in use decreased.
D、
Traffic fatalities decreased then because the number of cell phones in use increased.
【正确答案】
A
【答案解析】
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