The possessive pronoun "their" in the last paragraph is used in place of ______.

A．tobacco lobbyists has a rather strong influence on domestic politics
B．the health ministries of poorer countries don't want to control tobacco use
C．tobacco industry brings more harm than good to the poorer countries
D．each country should be free to decide if the promotion of smoking should be stopped

A．they are afraid that health-care costs will rise greatly due to smoking-related diseases
B．they are worried that there is no cure for lung-cancer and emphysema
C．they are worried that too much money will be spent on advertising
D．they are afraid that children may take up the habit of smoking when they are too young