Various options were given, the most popular being short polls online or via social media, followed by detailed surveys (online or via telephone).
Rhoddwyd amrywiol opsiynau a'r rhai mwyaf poblogaidd oedd arolygon byr ar-lein neu ar y cyfryngau cymdeithasol, ac yna arolygon manwl (ar-lein neu dros y ffôn).