Answer: Who does Maria know?
Step-by-step explanation:
We will translate the given sentence into English. The sentence reads "¿A Quién conoce Maria?" in Spanish and "Who does Maria know?" in English.
Quién means who. This combines with the preposition "a" (which means "to").
The verb, conocer, means to know (here, it is conjugated as conoce).
Then, we have Maria.
Altogether, this means "Who does Maria know?"