In text, which of the following statements is true of racial/ethnic differences and depression in the U.S.?
1) Second-generation Latinos (born in U.S.) experience higher level of depression compared to Latinos immigrated from their own countries.
2) Asian Americans' depression level is higher than other ethnic/racial groups.
3) African American adults show higher level of depression than Caucasian Americans.
4) There are no differences in depression level among the main ethnic/racial groups in U.S.