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In the excerpt “...the language-learning app Duolingo conducted a survey...”, the under...

In the excerpt “...the language-learning app Duolingo conducted a survey...”, the underlined nominal structure follows a specific pattern of modification. Which of the following options CORRECTLY identifies the grammatical function of the components and the core "head" of this noun phrase?


A

The entire phrase is a “verb-headed” structure because “learning” indicates a continuous action being performed by the app.


B

“Language” is the head noun, while “learning”, “app”, and “Duolingo” are post-modifiers providing specific details.


C

“Language-learning app” is a tripartite compound noun where “language” is the primary head and “app” is a suffix.


D

“App” is a verb in this context, and “language-learning” is a gerund phrase acting as the subject of the sentence.


E

“Language-learning” acts as a compound adjective modifying the head noun “app”, while “Duolingo” functions as a proper noun.