Which sentence correctly uses punctuation to separate items in a series?

We saw retrievers, terriers and shepherds, competing at the dog show.

He needed to pack lightly and only brought two, shirts two, pairs of pants and a sweater.

Cirrus, cumulus, and stratus, are the three main types of clouds.

Don't forget to bring your pencils, paints, and an easel to the art class.
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Respuesta :

Answer:

Don't forget to bring your pencils, paints, and an easel to the art class.

Answer:

Don't forget to bring your pencils, paints, and an easel to the art class.

Explanation:

The commas are correct. You have 3 items and two commas. That is correct. Always put a comma before the word "and" as well.