Each year in the United States, about ________ marriages end in divorce

The mental function of ________ remains a great mystery to neuroscientists

a. unconsciousness b. preconsciousness c. consciousness d. nonconsciousness e. semiconsciousness

Twelve-year-old Isabel spends most of her time with a group of six girls, who are friends and have similar family backgrounds, attitudes, and values. This group is Isabel's

A) crowd. B) social family. C) clique. D) circle.