The word that can be best used to complete the sentence in Spanish is either A or D "Mirandolo" or "Mirando lo"
This refers to the use of words to convey an idea or message that contains a subject and predicate and makes a complete meaning.
Hence, we can see that from the given sentence, there is the statement that they are looking at something and the present continuous tense is the best answer, so A and/or D are correct.
Read more about sentences here:
https://brainly.com/question/781903
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