Fill in the blanks with the most appropriate words.
______ best runner in the race was _______ young girl.

The correct option is C the/a

OPTION "A" is the correct answer.

EXPLANATION:

There are two types of articles:

DEFINITE ARTICLE (THE) : Article 'the' is used to refer to a DEFINITE thing or person.

INDEFINITE ARTICLE(A/AN): Article 'a/an' is used to refer to a thing or person in general. For instance: man, door etc.

Article 'a' is used with consonant sounds whereas article 'an' is used with vowel sounds.

In the first blank, article "the" will be used because article 'the' is used with superlatives (BEST).

In the second blank, article "a" will be used because article 'a' is used when speaker is making a general statement and mentioning something for the first time.