C, because in c, it should've been i have done, not I done
The Committee of Elders would call upon the Receivers for advice when they are faced with something that they have not experienced before.
Look ! Somebody
milk on the carpet. ✔
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The above sentence is in present perfect tense.
The present perfect tense is used to talk about events that have just completed.
It has the structure:- have/has + past participle.

Answer: what is the passage?
Explanation:
Answer: 4. At the skyscraper, we watched them in action building their masterpiece.
Explanation:
Active voice is when a form of a verb is such that the subject is the one that's performing the action and then takes a direct object.
The sentence in the paragraph that is in the active voice is "At the skyscraper, we watched them in action building their masterpiece".
The subject here is "we" and it takes a direct object " them". This is the correct option as others aren't in active voice.