According to the text's discussion of the use of illegal drugs,

A) among racial-ethnic groups,those who are multiracial have the lowest usage rates.
B) illicit drug use among youth as increased dramatically.
C) illicit drug use has declined among baby boomers.
D) cocaine is the most popular illegal drug.

Illegal Drugs

Substances whose production, sale, or possession is prohibited by law.

Illicit Drug Use

The use of substances that are illegal or not prescribed, which can lead to addiction and other harmful effects.

Racial-Ethnic Groups

Communities defined by shared racial characteristics and cultural heritage, emphasizing the combination of race and ethnicity as markers of identity.