How does the amount of nicotine in one dose of chewing tobacco compare with that in one cigarette?

a) Chewing tobacco has 2.5 times more nicotine than a cigarette.

b) Chewing tobacco has one-half as much nicotine as a cigarette.

c) Chewing tobacco has the same amount of nicotine as a cigarette.

d) Chewing tobacco has 5 times more nicotine than a cigarette