What do we call an intensely frightening experience that occurs during Stage 4 sleep?

Which of the following statements is TRUE?

a) U.S.-born Latino adolescents are just as likely to attempt suicide as foreign-born Latino youths. b) Foreign-born Latino adolescents are twice as likely to attempt suicide as U.S.- born Latino youths c) Foreign-born Latino adolescents are just as likely to attempt suicide as U.S.-born Caucasian adolescents d) U.S.-born Latino adolescents are twice as likely to attempt suicide as foreign-born Latino youths.

Research on low-level lead exposure and children's development indicates that

A) low blood levels are associated with early onset diabetes. B) higher blood levels are associated with distractibility, overactivity, and behavior problems. C) the majority of children overcome any negative cognitive effects by adolescence. D) early exposure to lead can be neutralized by fluoride treatments in drinking water.