The answer is "an infinitive verb".
Acabar de + infinitive is used to express an action that has ended prior the enunciation of the sentence.
Answer:
Alrededor de 1611, se retiró a su Stratford natal, murió el 23 de abril de 1616, y fue enterrado en su iglesia parroquial.
Those are both incorrect. They should read, “Juan es perezoso” and “Juanita es ambioso”
I believe the correct answer is C because it is the only one that sounds iffy as it contains present and past tense. Answer choices A and B sound fine. Hope this helps!