Which two statements are true about EIGRP manual summarization? (Choose two.)

A.
Manual summarization is configured on a per interface basis.

B.
Manual summaries can be configured with the classful mask only.

C.
When manual summarization is configured, autosummarization is automatically disabled
by default.

D.
The summary address is assigned an administrative distance of 10 by default.

E.
The summary address is entered into the routing table and is shown to be sourced from
the Null0 interface.