Besides BGP policy scaling and IBGP mesh scaling, service providers need to concentrate on controlling _______.

A.
The AS-Path length by using AS-PATH prepending.

B.
The BGP query process by using route summarization.

C.
The number of routes being redistributed from BGP into the IGP using route-maps.

D.
The number of routes being redistributed from the IGP into the BGP using route-maps.

E.
The number of BGP updates and the size of the BGP forwarding tables using route aggregation.