Final answer:
The correct translation is option A) "Lorena and Lucía wore beautiful dresses at the party."
Step-by-step explanation:
The correct translation of the sentence "Lorena y Lucía usan vestidos bonitos en la fiesta" into English is option A) "Lorena and Lucía wore beautiful dresses at the party." In this sentence, the verb "usan" is conjugated in the present tense, but the translation uses the past tense to indicate that the action has already happened.