Research on the Use of Nicotine Replacement Therapies Leads to the Conclusion

Research on the use of nicotine replacement therapies leads to the conclusion that .

A) there are no demonstrable differences in effectiveness between different nicotine replacement therapies
B) they are only slightly more effective than placebos
C) there may be significant long-term consequences to their use
D) pairing them with behavioral therapies does little to enhance treatment effectiveness