Mi amiga es ___ buena estudiante. Le gusta ir a la escuela.
A. un
В. una
C. el
D. la

Mi amiga es una buena estudiante.

Explanation:

The answer is 'una' because 'mi amiga' is singular and feminine.

She is not 'the' good student, she is 'a' good student. That is why it the answer is not 'la.'

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