Which Statement Is True Concerning the Eliminating Entries Required for Intercompany

Which statement is true concerning the eliminating entries required for intercompany sales of land from a subsidiary to its parent?

A) If the subsidiary sold the land to its parent in 2019 and the parent sells the land to outsiders in 2020, no eliminating entries are required in 2020.
B) If the subsidiary sells the land to its parent in 2019, and the parent still holds the land at the end of the year, the eliminating entries for 2019 include an adjustment to the subsidiary's beginning retained earnings balance.
C) If the subsidiary sold the land to its parent in 2017, and the land was sold to outsiders by the parent in 2019, no eliminating entries are required in 2020.
D) If the subsidiary sold the land to its parent in 2017 at a price that is less than the subsidiary's book value, and the parent still holds the land in 2020, the eliminating entry for 2020 will reduce the land's carrying value.