第2题: [单项选择]The studies on stress in the early 1970's led to ______[A] widespread concern over its harmful effects[B] great panic over the mental disorder it could cause[C] an intensive research into stress-related illnesses[D) popular avoidance of stressful jobs 参考答案:A 答案解析:根据文章第二段第二句话"And millions of Americans who work and live under stress worried over the reports.”,可以看出