（）all his riches, he was never contented.

A．chronic disease is the leading cause of death only in wealthy countries
B．chronic disease has developed alongside the country's economy
C．chronic disease is not the leading cause of death in China
D．more deaths occurred from the top three chronic diseases in cities than in rural areas in China

A．the government decrease tobacco advertising and raise taxes on cigarettes
B．China learn from the experience of developing countries
C．the government prohibit smoking in public places
D．China develop a strategy to combat chronic diseases