Question

but even as the walls fell, there were still a lot of barriers to seamless global integration. in the sentence above, seamless has the same or almost the same meaning as: consistent legal ultimate robust

Explanation:

"Seamless" means smooth and continuous without any interruptions or gaps. "Consistent" also implies a state of being steady, uniform, and without variation, which is similar in the context of global integration where a smooth and continuous (consistent) flow is desired. "Legal" relates to law, "ultimate" means final, and "robust" means strong - none of these match the meaning of "seamless" as closely as "consistent".

Answer:

consistent