Why should iBGP sessions be fully meshed within a Transit AS?（）
- A BGP requires redundant TCP sessions between iBGP peers.
- B Routes learned via eBGP are never propagated to other iBGP peers.
- C A full mesh allows for optimal routing within the Transit AS.
- D Routes learned via iBGP are never propagated to other eBGP peers.
- E Routes learned via iBGP are never propagated t o other iBGP peers.