Canadian health-care systems are different from those of the U.S. in that______.A．the fede

Canadian health-care systems are different from those of the U.S. in that______.

A．the federal government is directly responsible for them

B．private sectors in Canada play a more important role

C．the government only indirectly supports the employment-based plans

D．the trade unions in both countries are only moderately powerful in such matters