Which two statements are true?

Refer to exhibit. R1 (DR) failed, and after 10 minutes it came back. Which two statements
are true? (Choose two)

A.
R1 is a DR

B.
R1 is a BDR

C.
R1 is a DROTHER

D.
R2 is a DR

E.
R2 is a BDR

F.
R3 is a DROTHER