The correct plural form of the sentence in Spanish is:
Plural in Spanish.
To write in the plural in Spanish, it must be remembered that both articles, adjectives and nouns usually have gender and number characteristics and that within the same subject they must be the same, therefore, in the given sentence:
The female gender and the plural of each of them must be used, therefore, the correct options of article, plural noun and asjective respectively are "las," "clases," and "interesantes." Therefore, the option that contains these words is the one indicated.
More information about Spanish:
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