While an engineer deploys a new Cisco device to redistribute routes from OSPF to BGP, they notice that not all OSPF routes are getting advertised into BGP. Which action must the engineer perform so…

This option proposes to pass only O and E2 routes, which does not meet the requirement to include OIA and OE1 routes, and it misrepresents the redistribution mechanism.

The `synchronization` keyword in BGP relates to ensuring iBGP learned routes are present in the IGP before being advertised to eBGP. It has no bearing on which OSPF route types are initially redistributed into BGP.

The `nssa` keyword is used in OSPF area configuration to designate a Not So Stubby Area and is not a parameter for controlling route types during the `redistribute ospf` process into another protocol.

By default, when OSPF routes are redistributed into another routing protocol like BGP, only intra-area (O) and inter-area (OIA) OSPF routes are included. To ensure OSPF external type 1 (OE1) and external type 2 (OE2) routes are also advertised, the `internal` and `external` keywords must be explicitly configured in the redistribution entry, typically using `redistribute ospf <process-id> match internal external`.