Take another look at the item:

Coated with dust, (A) the blinds filtered shadowy light into Adrian's cluttered apartment, (B) where clothing and empty take-out boxes littered the floor. (C) As flies buzzed around rotting bananas on the kitchen counter.

You wanted to do this:

Coated with dust the blinds filtered shadowy light into Adrian's cluttered apartment, where clothing and empty take-out boxes littered the floor. As flies buzzed around rotting bananas on the kitchen counter.

Removing the comma after dust is an error. Coated with dust is a participle phrase. You need that comma to connect the phrase to the main clause that follows.

You might want to review the rules.

Go back to the sentence to try again.

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