Which “abuse” in the following sentences differs from the other three? A. It has been revealed that some government leaders abuse theirauthority and position to get illegal profits for themselves ． B. The first step to stop drug abuse is knowing why people start to use. C. The author suggests that in most domestic-abuse cases, women return home after the abuse because they are too scared of men’s power to leave. D. Research has suggested that sugar activates the same reward pathways in the brain as traditional drugs of abuse like morphine or heroin.