what point in the redo log does recovery begin and where does it end?

Because of a power outage, instance failure has occurred. From what point in the redo log
does recovery begin and where does it end?

A.
current redo log and inactive redo log

B.
checkpoint position to end of redo log

C.
beginning of redo log to end of redo log

D.
all redo logs before the point of last commit

E.
beginning of redo log to checkpoint position