What is the dark ,sticky substance that forms when tobacco is burned?

a. carbon monoxide

b. nicotine

c. stimulants

d. tar

What does the sociological imagination refer to?

What is one way in which an active listener can confirm understanding of a message?

Which of these is most likely to prevent pregnancy? a. tracking of female body temperature to identify ovulation times b. proper condom use c. male withdrawal before ejaculation d. proper spermicide use