Which of the Following Is a Key Difference Between Union

Which of the following is a key difference between union management relations in the United States and union management relations in other countries?

A) Unlike other countries, national unions in the United States bargain with the government or with employer groups.
B) Unlike other countries, unions in the United States focus on activism and integration with ruling governmental and political powers.
C) Unlike other countries, unions in the United States provide training programs that improve worker readiness and allow companies to hire a highly skilled workforce.
D) Unlike other countries, collective bargaining contracts in the United States usually spell out compensation, work rules, and the conditions of employment for several years.