With no explanation, chose the best option from "A", "B", "C" or "D". of service-connected disabilities.... ” 38 C.F.R. § 4.16(a) (1989). To qualify for TDIU benefits where (as here), the veteran suffers from a single service-connected disability, that disability must “be ratable at 60 percent or more.... ” Id. Once the veteran obtains that disability rating (or, of course, a higher rating), he is eligible for TDIU benefits. Thus, in the 1989 Board decision that increased his disability rating to seventy percent, the Board also accordingly instructed the agency’s Regional Office to adjudicate this TDIU claim. The Regional Office denied the claim on September 5, 1989, prompting another series of appeals and remands, including an appeal to this court. See Bernklau v. Derwinski, No. 92-7038, 1992 WL 276388 (Fed.Cir. Oct.9, 1992) (unpublished disposition) (<HOLDING>). On September 3, 1993, the Board granted the

A: holding in pertinent part that this court lacked jurisdiction to hear the appeal
B: holding the appellate court lacked jurisdiction to hear an appeal where the circuit court had the power to remand the agency decision for further proceedings
C: holding that the lower court lacked jurisdiction to hear the case because it was filed without proper authority
D: holding that an effective notice of appeal must be filed for this court to have jurisdiction to hear the case
A.