Which two options are valid Repository Variable names?

Which two options are valid Repository Variable names?

A.
USER

B.
CurrentDay

C.
CurrentMonth

D.
Date

Explanation:
CurrentDay and CurrentMonth can be calculated by a sql statement.
Note:
REPOSITORY VARIABLE(DYNAMIC)
Initialized when BI server is started
Assigned value dynamically based on the result of a query
Value is dependent of the sql provided in Initialization Block
Create a dynamic variable and provide a Name and Default Initializer.Create a new initialization
block by clicking on the New button in the above screen.

Provide Intialization Block variable Name