Questions 24—26 are based on a passage about No Tobacco Day. You now have 15 seconds to read Questions 24—26.

What is the recent important development observed in developing countries

A．The number of smokers has been falling 2 percent a year.
B．The number of smokers has been rising 20 percent a year.
C．The number of smokers has been rising 2 percent a year.
D．The number of smokers has bean falling 20 percent a year.