Final answer:
The most correct translation of the sentence is "María fue a Perú el año pasado con su familia."
Step-by-step explanation:
The most correct translation of the sentence "Maria went to Perú last year with her family" is: "María fue a Perú el año pasado con su familia."
In this sentence, the verb "went" is in the past tense, which is translated as "fue" in Spanish. The verb "iba" would indicate an ongoing action in the past, which is not the case here. Additionally, the verb "era" is used to express a permanent state or condition, which is not appropriate in this context.
Therefore, the correct translation is: "María fue a Perú el año pasado con su familia."
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