A.People who link to the web site can ask and answer questions concerned.B.People who link to the web site can share experiences with each other.C.The anti-smoking campaign can help individual smokers to design effective ways to quit.D.All of the above.
A.People who link to the web site can ask and answer questions concerned.
B.People who link to the web site can share experiences with each other.
C.The anti-smoking campaign can help individual smokers to design effective ways to quit.
D.All of the above.