Which linguistic term was specifically trademarked and popularized by Rosetta Stone to describe their immersive language learning method?

In the competitive world of language learning apps and services, brand positioning through specific linguistic terminology has become increasingly important. Companies carefully craft their marketing language to appeal to different segments of language learners. This poll tests your knowledge about how language learning brands have positioned themselves in the market through their terminology and marketing approaches.

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Dynamic Immersion®
Natural Acquisition Protocol®
Linguistic Recursion Method®
Cognitive Language Mapping®