Which substance enters the blood when a person smokes cigarettes? question 7 options: tar alcohol nicotine emphysema

Nicotine enters the blood when a person smokes cigarettes.

The controlled Substances Act is an act which was established by president Richard Nixon on 27th of October, 1970. This act is a drug policy under which the manufacture, importation, possession, use and distribution of certain narcotics, stimulants, depressants, hallucinogens, anabolic steroids and other chemicals is regulated. this act also classifies restricted drugs into specific categories and regulates the prescription and dispersion of drugs. so answer to your question is D. all of the above