She cooked ... breakfast herself. A) the B) a C) an D) -

She cooked breakfast herself. - Она сама приготовила завтрак.

A, an and the are articles. A / an is indefinite article. The is definite article. The meaning of indefinite article is one. We put a before consonants (a pen, a book) and we put an before vowels (an apple, an eye) ...

We put definite article when the noun is already known.

With meals we don't use article.

She didn't cook breakfast herself. (negative).

Did she cook breakfast herself? (General question).

Who cooked breakfast herself? (Special question).