"estudiaría" would be the conditional form of the verb "s/he studies", changing it to "s/he would study"
Answer:
El profesor habla a los estudiantes
Well the right one is the last option but the thing your wanting to translate isn't even an option so idk :/
Question:<span>What might you say when you run in to someone you know who s going somewhere?
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Answer:</span>
<span>
C ¿adonde vas?</span>