Respuesta :
The best revision of the sentence is D. Tension erupted in the room when it was revealed that the villain knew that the spy withheld information.
What is Concord?
This refers to the agreement of a subject with its verb in a given sentence to make it grammatically correct.
Hence, we can see that based on the given sentence, the verb is in the past tense, and hence, the subject needs to be in the past tense too and option D best contains this.
Read more about concord in grammar here:
https://brainly.com/question/22698220
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