Which three statements are true about stage variables in a Transformer Stage? (Choose three.)

A.
Stage variables can be set to NULL.

B.
Varchar stage variables can be initialized with spaces.

C.
Stage variables are refreshed with default values before each new input row is processed.

D.
The expression executed for a stage variable can refer to a stage variable which is executed
later.

E.
A stage variable in one Transformer can refer to a stage variable in another Transformer,as
long as the second Transformer was processed earlier in the job flow.

Explanation: