[单项选择]There’s nothing simple about gun control, a tangle of legal, political and public-health issues complicated by cultural preferences and regional biases. Passions run high on all sides. Lifelong hunters who
grew up with firearms, urban victims of gun violence, Second Amendment scholars, NRA lobbyists, chiefs of police—they’ve all got cases to make and they make them well, often contentiously.
For the past 15 years, much of the debate has centered on the effectiveness of the Brady Handgun Violence Prevention Act, the federal gun-control bill that was passed in 1993. Critics say the focus on law-abiding gun buyers doesn’t address the real issue—bad guys who acquire their weapons illegally. Supporters say that the bill stops thousands of illegal gun purchases and deters crime and violence. Now medical research has come to the rescue, sifting through the data to figure out which legal measures work best to reduce firearm suicides and homicides.
In a paper published in the May i
A. local background checks are more effective than federal checks.
B. state-level background checks are more effective than federal checks.
C. people with mental-health problems are more likely to commit suicide.
D. federal background checks are more effective than local background checks.