Consider the following segment of the log record containing the actions taken by transactions beforethe crash.
⟨T3 start⟩⟨T3, D, 200, 50⟩⟨T1 start⟩⟨checkpoint {T1, T3}⟩⟨T1, A, 100, 150⟩⟨T2 start⟩⟨T2, B, 200, 500⟩⟨T1, C, 50, 100⟩⟨T2 commit⟩⟨T3, D, 50, 150⟩⟨T3 abort⟩
Mark the correct statements:
In a log-based recovery scheme with Write-Ahead Logging (WAL), if the system crashes after writing a data page to disk but before writing its corresponding log record, the change is guaranteed to be redone during recovery.