Amajor exception to the mens rea principle involves offenses, which are criminal acts that require no showing of intent.

vertical merger is the term used for the joining of two or more firms involved in different stages of producing the same good or services.

explanation:

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.