（售前售后联系微信号:newbalance533 禁止商业传播.否则停止更新）Which of the following best describes private-sector workplace monitoring in the United States?

A Employers have broad authority to monitor their employees

BU.S. federal law restricts monitoring only to industries for which it is necessary

CJudgments in private lawsuits have severely limited the monitoring of employees

DMost employees are protected from workplace monitoring by the U.S. Constitution