Which two of the following statements are true regarding dynamic repository variables?

A.
Dynamic repository variables are initialized and refreshed using an initialization block.

B.
Dynamic repository variables are created and assigned a value when each user logs on

C.
Dynamic repository variables have values that are initialized in the dynamic repository variable dialog box.

D.
Dynamic repository exists in two forms, system and non-system

E.
A dynamic repository variable might be used to determine how data issplict between two partitions.