Take another look at the sentence:

Jenny noticed a greasy snail-like trail that snaked from the kitchen counter onto the floor and then over to the hallway, June, Jenny's cat, had stolen another stick of butter and tried to drag it to the laundry room.

Jenny's cat is an appositive. An appositive renames the noun that comes before it, in this case, June. An appositive will frequently interrupt the flow of a sentence, and when it does, as in the case above, you need to put a comma both in front and behind the interrupter.

Go back to the sentence to try again.

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