Marijuana users in the 1960s were less likely to develop drug dependence than users starting around the year 2000.This trend MOST likely reflects the fact that:
A) the THC content in marijuana has increased.
B) people started using marijuana at earlier ages.
C) marijuana is now consumed via multiple routes.
D) medical marijuana is legal in a number of states.

Question

Quizplus · Accepted Answer

The THC content in marijuana has increased over the years, making it more potent and potentially more addictive, which could lead to a higher likelihood of developing drug dependence.

Marijuana Users in the 1960s Were Less Likely to Develop