How do taxes from tobacco sales influence global tobacco regulation efforts?

a) Governments stand to lose significant tax revenue if tobacco use is strictly regulated
b) Taxes pay for treatment and prevention efforts, media campaigns and nicotine replacement aids.
c) Governments reduce taxes on tobacco to spur local economic growth, then raise them to reduce tobacco use.
d) Taxes are used to subsidize the tobacco industry, which then lobbies for reduced global regulation of tobacco.

A