Questão de Língua Inglesa

Analyze the following statements about the underlined words in the fifth paragraph: I. The noun “set” (l. 26) is countable, just as in the sentence “There are two sets of pens over the table, take one to your office”. II. The word “issues” (l. 27) is uncountable, just as in the sentence “Have you seen the latest issue of the paper? I’m sure it arrived this morning”. III. The word “climate” (l. 29) is uncountable, just as in the sentence “A climate of uncertainty took over the room”. Which ones are correct?