Instruction: Answer question based on the following text.
Consider the following statements. I. The plural of the words ‘sketch’ (l.14) and ‘inventory’ (l.17) follow the same spelling rule. II. To turn a singular sentence into plural, one has to both nouns and adjectives. III. The main rule of verb agreement in the third person singular is to add –s, as it is the case in ‘go’ (l.17). Which ones are INCORRECT?