The correct answer is: D. no article
Mount Everest is the tallest mountain in the world, so it is not preceded by an article.
An article is a word that is used before a noun to indicate whether the noun is specific or general. In this case, Mount Everest is a specific mountain, so it does not need an article.
The other options are incorrect because they are all articles.
- A is incorrect because it is an indefinite article. Indefinite articles are used before nouns that are not specific.
- B is incorrect because it is an indefinite article. Indefinite articles are used before nouns that are not specific.
- C is incorrect because it is a definite article. Definite articles are used before nouns that are specific.
I hope this helps!
