Which literary technique is characterized by the use of a variety of language characterized by regional accents and the use of idiomatic expressions and grammatical conventions?

A. dialect

B. flashback

C. irony

D. metaphor

A - Dialect is the correct option.

This is the literary technique characterized by regional accents and the use of idiomatic expressions and grammatical conventions. These characteristics are known as linguistic variables and are present in the language used by people who live, for example, in rural areas. The English used by royal members and members of Parliament is different from the English used by people living in rural British areas such as Devon or Suffolk. If a writer uses a dialect, he / she may be interested in creating true characters speaking their real dialect.

B - Flashback is not correct because this is a literary technique used to represent a character's past memories.

C - Irony is not correct because it is a technique used to express contradictory ideas or facts.

D - metaphor is not correct because this is used to construct an implicit comparison.