D. They process language, not read it for understanding.
AI-assisted translation may work well when literal translation is needed, that is, when translation must be free of any form of interpretation, since interpretation is inextricably linked with subjectivity, abstraction and irrational or surreal elements on human thinking.
AI-assisted translation can translate literal meaning of words and literal structure of grammar, but it cannot understand the sense behind words and sentences.
Therefore, we conclude that right answer is D.
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