Answer:
A. Correct
Step-by-step explanation:
Éste is used to replace a noun. Éste means "this", mio means "mine", and es means "is". "This" and "mine" must match in gender, which they do. Éste is masculine and mio is masculine. Their feminine form would be ésta and mia.
Got 100% on the Spanish Edge test, trust me.
Please click the heart if this helped.