The Milky Way Has Both a Thin and Thick Disk

The Milky Way has both a thin and thick disk of stars. Which one of the following statements about them is FALSE?

A) The thin disk stars on average are younger than the thick disk stars.
B) Molecular clouds are distributed more like the thin disk stars rather than the thick disk stars.
C) The thin disk stars on average have lower abundances of heavy elements than the thick disk stars.
D) The thick disk stars may be older thin disk stars that have higher upward velocities because they have gravitationally interacted more with molecular clouds in the spiral arms.
E) The thick disk may have formed when a small dwarf galaxy merged with the Milky Way.