Breath samples can be used to determine BAC (Blood Alcohol Content). However, they are only accurate at BACs above 0.15 percent. They do not provide an accurate indicator of BAC across a wide range. Additionally, breath samples are inaccurate if the drinker uses breath mints. What is the limitation of using breath samples to determine BAC?
1) They are only accurate at BACs above 0.15 percent
2) They do not provide an accurate indicator of BAC across a wide range
3) They are inaccurate at all blood levels
4) They don't work if the drinker uses breath mints