Question

Some of the vocabulary in Thousand and One Nights can be described as archaic because _____.

Answer 1

B language of the past. 

Archiac means very old-fashioned.

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Answer 2

Some of the vocabulary in Thousand and One Nights can be described as archaic because it is language of the past .

Archaic is defined as very old or old-fashioned; it also refers to a word or a style of language which is no longer used used but  is sometimes a resource to impart an old-fashioned flavour.

One Thousand and One Nights is a collection of Middle Eastern folk tales written in Arabic during the Islamic Golden Age.