Intellectual property refers to the collective name of rights produced in accordance with law based on creative intellectual achievements and industrial and commercial marks. Which of the following statements about intellectual property is correct? ['is a property right.', 'is a kind of personal right with the characteristics of sustainability.', 'Taking the intangible object as the subject and having both the right of the person and property.', 'Obtained in one country, that is, under the common protection of all countries in the world.']