The tone of this passage is ______.

A．1 meanA. Because you are backed by the government.B. Because you are not alone.C. Because you have good colleagues.D. Because governments are blind to evils of smoking too.

A．World governments should conduct serious campaigns against smoking.
B．World governments take timid measures against smoking.
C．Smoking is the most important source of income to many countries.
D．Tobacco industry spends a large sum of money on medical researc