Answer:
<h2>D. Fueron</h2>
Explanation:
If the subject is you-all – informal (vosotros/vosotras), conjugate by dropping the ending and add -áis, -éis, or ís. If the subject is they (ellos/ellas) or you-all – formal (ustedes), conjugate by dropping the ending and add -an (-ar verbs) or -en (-er and -ir verbs).
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