Peak Absorption for Nicotine from Smoked Cigarettes Occurs After 7

Multiple Choice

Peak absorption for nicotine from smoked cigarettes occurs after 7 minutes,whereas peak absorption for nicotine inhaling e-cigarette vapor occurs after 20 to 30 minutes.This suggests that:

A) the heating levels for lit cigarettes and e-cigarettes must be different.
B) e-cigarettes must have less nicotine content than real cigarettes.
C) nicotine absorption occurs mostly in the lungs for cigarette smoke and mucous membranes for e-cigarette vapor.
D) the puff duration of cigarettes must differ from e-cigarettes.