1. Which one of the followings is suggested in the United States?

• A. The number of service workers may be underestimated by the definition of services used by the government
• B. The number of service workers may be underestimated by the definition of services used by the government
• C. The number of service workers may be underestimated by the definition of services used by the government
• D. The number of service workers may be underestimated by the definition of services used by the government

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