Take another look at the sentence:

__________, a dirty hamster cage, and a glass of old milk all contribute to the unbearable stench emanating from Wilson's bedroom.

The blank requires a noun phrase. You chose gym socks that are smelly from sweat, which is a noun phrase followed by an unnecessary relative clause. You thus have a parallelism error.

Before you continue, review the rules for parallel structure.

Go back to the sentence to try again.

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