Marijuana is often described as a "gateway drug." What does this term mean?

(1 point)
Responses

Marijuana is so physically addictive that using it once or twice will lead to a need to graduate to harsher drugs.
Marijuana is so physically addictive that using it once or twice will lead to a need to graduate to harsher drugs.

Marijuana is relatively easy to come by, and its use breaks a social barrier that becomes subsequently easier to break.
Marijuana is relatively easy to come by, and its use breaks a social barrier that becomes subsequently easier to break.

Marijuana is regularly mixed with heroin, so using it could lead someone to become addicted to heroin.
Marijuana is regularly mixed with heroin, so using it could lead someone to become addicted to heroin.

Everyone likes marijuana, so its use encourages people to try stronger drugs like cocaine or ketamine.

Everyone likes marijuana, so its use encourages people to try stronger drugs like cocaine or ketamine.