The correct answer is A. Dialect
Step-by-step explanation
A dialect is a linguistic system derived from a language or a variation in language. This means dialects are not radically different from the language they derive but often include words, expressions, and other unique language features. Dialects usually relate to a specific community or group and originate due to particularities in culture, social context or geographical location. Therefore, the dialects are closely related to culture, and the social configuration of a community, for example, in English language British English and American English represent different dialects. So, the correct answer is A. Dialect.