Gun control measures passed by president
-restricted gun use to the military.
-raised the legal age for buying guns.
-required background checks to buy guns.
-required proof of citizenship to buy guns.

Gun control measures passed by the Clinton administration required background checks to buy guns.

The correct answer is:  

Required background checks to buy guns.

Gun control was a central political matter in Bill Clinton's first presidency. Clinton signed the Brady Bill, which required federal background checks on firearm buyers as well as a five-day waiting period. Clinton also signed the 1994 Federal Assault Weapons Ban, which outlawed the manufacture of assault weapons for civilian use.  

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