A dialect is a variety of language that is distinguished by its

A) vocabulary.
B) grammar.
C) pronunciation.
D) All of these.

A dialect can be distinguished by all three factors of vocabulary, grammar, and pronunciation. Dialects often arise from regional, social, or cultural differences and can differ in all of these areas. For example, Southern American English has distinct vocabulary (e.g. "y'all"), grammar (e.g. "fixing to"), and pronunciation (e.g. dropping the final "g" in -ing words).