Instruction: Answer question based on the following text.
Consider sentences from the text; then analyse the following statements: I. A possible synonym of 'harsh' (l. 05) is 'rough', considering the context of the sentence. II. Considering the context, 'who has been teaching' (l.09) should be translated to 'que têm ensinado'. III. Although it has a gerund form, 'having' (l.22) is classified as an adjective. Which ones are correct?