Recent Studies Have Found ____

Recent studies have found ____. 

A)  higher rates of relapse among smokers who used nicotine replacement therapy than those who had professional counseling​ 
B)  ​equivalent rates of relapse among smokers, regardless of whether they used nicotine replacement therapy, with or without professional counseling 
C)  ​lower rates of relapse among smokers who used nicotine replacement therapy than those who had professional counseling 
D)  ​lower rates of relapse among smokers when they had professional counseling rather than when they used nicotine replacement therapy 
E)  ​higher rates of relapse among smokers when they had professional counseling rather than when they used nicotine replacement therapy