C. Millie and Vanessa live two blocks from one another.
Explanation:
This is the only answer that doesn't use first person pronouns. The others all use I or we, indicating it is being said from someone involved, while this uses names and no first person pronouns.
All three of these are true. That's why you can still find many of the islands inhabited by small groups of people that migrated there thanks to the Lapita technological advancements.