What happens during a differential backup? (Select two)

A.
The archive bit is set to 1

B.
The archive bit is left alone

C.
The archive bit is reset to 0.

D.
The transaction log is cleared.

E.
The transaction log is left alone.

Explanation:
Industry Standard Architecture – Student Guide 2 – Page 194
Differential
In a differential backup, only the new or changed files with the archive bit set on are backed up.
After a file is backed up, the setting of its archive bit is NOT changed. A differential backup initially
takes the least amount of time to perform, but the time it takes increases as more and more files
are included.