Final answer:
The claim that K-Mart stopped selling handgun ammunition following the Columbine shooting is true, reflecting the ongoing national debate on gun control and the connection between access to firearms and mass shootings.
Step-by-step explanation:
The statement that K-Mart, the retailer who sold the ammunition to the Columbine shooters, announced it would no longer sell handgun ammunition is true. This decision was part of a broader societal debate on the accessibility of firearms following numerous school shootings. The Columbine High School massacre in 1999 sparked a national conversation about gun control and the way society handles mental health issues. Advocates for stricter gun control see a direct link between easy access to firearms and the incidence of mass shootings, such as the one at Sandy Hook Elementary School in Newtown, Connecticut. On the other hand, gun rights advocates argue that the availability of guns is not the root cause of these tragedies.