The study of personal spaces is called _____

Approximately what percent of male students say that they have carried a weapon on school property?

A) 2 B) 9 C) 18 D) 29

Adoption studies estimate the genetic contribution to a given trait by studying

A) adopted children only. B) adopted children and their biological family. C) adopted children, their biological family, and their adoptive parents. D) none of the above.