A、EIGRP would be appropriate if LMI type ANS I is NOT used.
B、EIGRP would be appropriate, because the Frame Relay spokes could be segmented into their own areas.
C、EIGRP would be appropriate, because by default, queries are not propagated across the slow speed Frame Relay links.
D、EIGRP would be appropriate, because you can manage how much bandwidth is consumed over the Frame Relay interface.