21 The structural intuitions which native speakers have about the syntax of their language are of two types, namely (i)
intuitions about how sound-sequences in sentences are structured into successively larger structural units which we call
_______ and (ii) intuitions about whether particular set of structural units belong to the same _____ or not.
(A)allomorphs, class (B)morphemes, level (C)constituents, category (D)nodes, genre