The correct choice is D. (It always uses two verbs: a form of the verb estar and a present participle)
Grammatically speaking, sentences with present progressive tense have the following structure:
Pronoun + verb "estar" + auxiliary verb in gerund + complement
Here are two examples of sentences with present progressive tense:
La cangreja Juanita está comiendo lechuga.
Su dueño, don Andrés, está proporcionando la lechuga con cuidado.
Hence, the correct choice is D. (It always uses two verbs: a form of the verb estar and a present participle)
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