Survey (or possible exam question for NT and Christian Origins)

Who were the Hellenists mentioned in Acts? Why do you think this? Please leave your answer in a comment. I am interested to collect opinions on this question.

1. Greek-speaking Jews moved into Jerusalem from the diaspora, conservative-minded toward the Law.
2. Greek-speaking Jews moved into Jerusalem from the diaspora, liberal tendencies toward the Law.
3. Greek-speaking Gentiles associated with a local Jerusalem synagogue, "god-fearers".
4. Greek-speaking Gentiles and Jews associated with a local Jerusalem synagogue.
5. Greek-speaking Gentiles with no affiliation with a local Jerusalem synagogue.
6. These folks are a fabrication of the author of Acts.
7. Other