Convert the sentence provided below from its passive voice structure to an active voice structure:
Ancient artifacts are believed to have been quietly removed from the location by trespassers before the audit.

Question

Accepted Answer

1. Identify the agent and action: **trespassers** (agent) and **removed** (action).

2. Change passive "are believed to have been removed" to active keeping the belief: **are believed to have removed**.

3. Keep the adverb **quietly**, the object **ancient artifacts**, and the time **before the audit**.

4. Option **(c)** matches this correct active form.

FINAL_ANSWER: c

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