Dr. markowitz studies the effects of heredity on behavior. one of his areas of research focuses on similarities and differences in identical twins who were separated at birth or in early infancy and thereafter raised by different families. dr. markowitz is most probably a:

Behavioral Geneticist is the correct answer.

Behavioral geneticists study how the genetic and the environment can influence human behavior. In order to do so, they focus on the similarities and differences between twins that were separated at birth or early infancy and raised by different families.  

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the correct answer is :

{b.}   ( american workers lose job opportunities )

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