These vs They What variant is correct and why: "-Whose cars are these? 1. These are her cars 2. They are her cars? P.S.: Is anything correct here?: 2. What are these? — These are black bags. 3. Who is this? — This is my sister. 15. Is this your cassette? — Yes, this is my cassette. 1. Whose cat is this? — This is my cat. 2. What city is this? — This is Madrid. 5. Whose apples are these? — These are not my apples, these are your apples. 6.Whose brother is this? — This is his brother. 7. What are these? — These are your apricots. (taken from the book by Оваденко)I read in the book that when a question has THESE we should change it yo THEY like in "-Whose cars are THESE? - THEY are her cars; but later I came across the sentences that don't follow the rule: . What are THESE? — THESE are black bags. (Why not THEY are black bags). So my question is as follows: which one is correct: What are THESE? — THESE are black bags. or THEY are black bags