What are two benefits of using client-driven PST migration? (Select two.)

What are two benefits of using client-driven PST migration? (Select two.)
A . it is the fastest PST migration method
B . corrupted PSTs are fixed automatically during migration
C . it copies items it is loading in chunks into the local Vault Cache, avoiding extra downloads
D . PST files bigger than 20GB are migrated in bigger chunks, avoiding the file table corruption in a PST file during migration
E . it allows PST migration to continue while Outlook is open

Answer: C, E