Which of these periods British literature occured during the twentieth century was it romantic restoration or Edwardian?

* Romantic Period: This period spanned roughly from the late 18th century to the early 19th century.

* Restoration Period: This period was in the late 17th century, after the English Civil War.

* Edwardian Period: This period encompasses the reign of King Edward VII, which lasted from 1901 to 1910. It is considered part of the early 20th century, overlapping with the start of the Modernist movement in literature.

Therefore, only the Edwardian Period falls within the 20th century.