Select the most appropriate option to fill in the blank and make a grammatically correct sentence.

London is _____ European city.

a

The most appropriate option to fill in the blank and make a grammatically correct sentence is:

☀ a

The sentence would read: "London is a European city."

Explanation: In this context, "a" is used as an indefinite article before the word "European" to indicate that London belongs to the category of European cities. The other options don't fit the context:

• No article: While it's common to omit articles in some sentences, using an article here helps clarify that London is a city within the category of European cities.

• An: "An" is used before words that start with a vowel sound, but "European" doesn't start with a vowel sound, so "a" is more appropriate.

• The: "The" is used before specific nouns or to refer to something previously mentioned. In this case, "the" wouldn't fit because the sentence is introducing the information that London is a European city.