单项选择题

Congressional Democrats and union officials said yesterday that a National Academy of Sciences report to be released today about workplace injuries stressed the need for the ergonomics regulations that President Clinton issued two months ago.
The new report, "Musculoskeletal Disorders and the Workplace," found that about one million injuries were caused each year by repetitive motions on the job or by other work-related ergonomic factors. The report, which Congress ordered two years ago, said a conservative estimate of the cost of such injuries was $ 50 billion a year.
Republicans and business groups also seized on the new report, saying it provided little justification for Mr. Clinton’s new ergonomics rules. Some corporate groups estimated that the new rules would cost $120 billion to carry out, while the Occupational Safety and Health Administration put the cost at $ 4.5 billion.
Acknowledging that the new report points to ergonomics problems in a limited number of occupations, Randy Johnson, vice president for labor policy at the United States Chamber of Commerce, said, "This study clearly does not support a regulation as broad as OSHA issued, by OSHA’s own estimates covering over 100 million employees."
Although the report is to be issued today, Congressional leaders were briefed on it yesterday, and then many Congressional aides told their friends in business and labor groups what the report said. Many business lobbyists have said their No. 1 goal in the Bush administration is either to have the new president remove the ergonomics regulations or to have Congress overturn them.
Defenders of Mr. Clinton’s ergonomics regulations said the report supported their position by stating that modifications of physical factors on the job could help reduce musculoskeletal injuries.
George Miller, the California Democrat who is the ranking minority member on the House Education and the Workforce Committee, said, "The N. A. S. study clearly and unambiguously concludes that there is substantial scientific justification for the ergonomics regulation sought by the Clinton administration."
Mr. Miller criticized Republicans in Congress for calling for study after study as a way to make President Clinton delay the regulations.
John A. Boehner, the Ohio Republican who is the committee’s chairman, said the new study underscored the business viewpoint that there was no scientific basis for OSHA’s broad approach.
"The study also was careful to note that a generic ’one size fits all’ solution to these problems is neither feasible nor desirable," Mr. Boehner said. "This approach adopted by 0SHA’s standard is simply not practical."
Labor unions, which pushed Mr. Clinton to adopt the new ergonomics rules, applauded the academy’s report. Eric Frumin, director of safety for the Union of Needletrades, Industrial and Textile Employees, said, "The N. A. S. report comprehensively reviewed thousands of studies in the scientific literature on workplace musculoskeletal disorders and concluded that interventions in the workplace have been proven to protect workers from ergonomics hazards.\
What is the purpose of the controversial report mentioned in the passage