Answer: está; están
Sentence: Claudio está mojado. Las toallas están secas para Claudio.
Translation: Claudio is wet. The towels are dry for Claudio.
Explanation:
The subject in the first sentence is "Claudio", that is a first-person singular, so the verb must be conjugated in this form: Él está mojado.
The subject in the second sentence is "toallas", that is a first-person in the plural, so the verb must be conjugated in this form: Ellas están secas.
