Tolerance to the Effects of Smoked Marijuana

Tolerance to the effects of smoked marijuana

A) allows experienced marijuana users to obtain euphoric effects with minimal cognitive impairment.
B) has not been reliably found for any of marijuana's effects.
C) is so powerful that chronic users must smoke more and more to attain less and less euphoria.
D) is very rapid,such that it is almost impossible to get high again within a few days after smoking.