Which two statements best describe intradomain route summarization?

Which two statements best describe intradomain route summarization? (Choose two.)

A.
OSPF and RIP automatically summarize at classful network boundaries.

B.
EIGRP and OSPF automatically summarize at classful network boundaries.

C.
EIGRP and RIP automatically summarize at classful network boundaries.

D.
EIGRP and OSPF must be manually configured to summarize at non-classful boundaries.

E.
EIGRP and OSPF automatically summarize at non-classful boundaries.