_____ refers to a language's rules for combining words to form acceptable phrases and sentences.

A) Phonology
B) Semantic
C) Morphology
D) Syntax

Syntax refers to the rules that govern how words are combined to form phrases and sentences in a language. This includes things like word order, sentence structure, and grammatical rules for verb tense, agreement, and so on. Phonology refers to the sound system of a language, semantic refers to the meanings of words and their relationships to one another, and morphology refers to the structure of words themselves (how they are formed from smaller units called morphemes).