Which BGP capability must be negotiated on the BGP session for R2 to install the routes accepted by

Refer to the Exhibit.

In the exhibit, an EBGP session is currently established between R1 and R2. R2 changes its
import policy to accept 10 of the routes it previously denied from R1.Which BGP capability must be
negotiated on the BGP session for R2 to install the routes accepted by the new policy?

A.
route refresh

B.
AddPath

C.
outbound route filtering (ORF)

D.
multiprotocol BGP (MBGP)