Nthe 1970s, police departments created small units consisting of patrol officers, investigators, and supervisors, assigning them to neighborhoods on a long-term basis in order to increase the exchange of information and improve cooperation, in an effort called

team policing

Explanation:

Team policing:-

Team policing was an effort made by the police department which was intended to improve the police community relations as well as the police effectiveness in crime control. It can be done by assigning a particular group of the police officers permanently to a specific geographic area which is considered to be neighborhood.

Thus, according to the question, the effort that the police departments in the 1970s creating units in the neighborhoods is called team policing.

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.

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.