Because noises modulate radio frequency, radio stations use a band of frequencies to prevent interference with other stations.（）

A.How should I take ZYBAN  
B.What is ZYBAN  
C.What are the side effects of taking ZYBAN  
D.Who invented ZYBAN  E How long should I take ZYBAN  
F.How long does it take for ZYBAN to work

A.How should I take ZYBAN  
B.What is ZYBAN  
C.What are the side effects of taking ZYBAN  
D.Who invented ZYBAN 
E.How long should I take ZYBAN  
F.How long does it take for ZYBAN to work