The responses that a DNS server returns to DNS client requests are classified as either authoritative or non-authoritative. What are two characteristics of non-authoritative responses? (Choose two.)

A.
are always correct

B.
are sourced from a disk-based file

C.
are sourced from a server’s cache

D.
can be incorrect if the server’s cache contains stale data

E.
if validated from at least two other sources, are promoted to an authoritative response