Final answer:
The best translation of the sentence "These plates are dirty." is "Estos platos están sucios."
Step-by-step explanation:
The best translation of the sentence "These plates are dirty." is "Estos platos están sucios."
In Spanish, the word "estos" refers to a group of objects that are close to the speaker, while "esos" refers to a group of objects that are farther away. Since the sentence doesn't provide any context, it is best to use "estos" to refer to the plates close to the speaker.
Therefore, the correct option is: Estos platos están sucios.
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