Which nation has threatened world security in recent years because of its interest in becoming a nuclear power? north korea venezuela vietnam iraq

North Korea

Explanation:

North Korea is the country that has threatened world security in recent years because of its interest in becoming a nuclear power.  Its leader wants to impose himself as a world figure and uses the threat of nuclear weapon as a bargaining chip.

Venezuela : The country is on the verge of a civil war, totally collapsed, not a threat to the world, but to its people yes.

Vietnam: No major conflict happening there now, and certainly not an emerging nuclear power.

Iraq: still recovering from wars... not a nuclear threat.

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.

answer; cultural trait;