Concept:Content words carry the main meaning in a sentence. They are also called lexical words.
Explanation:Content words include nouns, verbs, adjectives, and adverbs.
They refer to things, actions, qualities, or states.
These words have independent meaning when used alone.
Function words (grammatical words) like prepositions, conjunctions, and auxiliaries have little lexical meaning.
Thus, content words are known as lexical words.
Answer:C. lexical words