Refer to the exhibit.

How would you adjust the design to improve convergence on the network?

A.
Add an intra-POP link between routers 1A and 1B, and enable IP LFA FRR.

B.
Use an IP SLA between the end stations to detect path failures.

C.
Enable SSO-NSF on routers 1A and 1B.

D.
Use BGP to connect the sites over the WAN.