Refer to the exhibit.

R2 does not have R1 1.1.1.1/32 subnet in its BGP table. Which issue can be causing this problem?

A.	XR4 does not have next-hop-self for a R2 iBGP session.
B.	R2 does not have no auto-summary configured.
C.	XR4 drops any update coming from R1.
D.	IPv4 address-family is not enabled on R1.