Which of the Following Describes Weston's Study of Gays and Lesbians

Which of the following describes Weston's study of gays and lesbians in San Francisco?

A) Weston used random sampling techniques to select her sample.
B) This study focused on the family lives of gay and lesbian political activists.
C) Weston used friendship pyramiding and snowball sampling to achieve a sample that varied by race and class.
D) Weston's research used a combination of focus groups and a telephone survey.