В.
1) … didn’t they? Yes, they did.
2) … did they? Yes, they did.
3) didn’t they? Yes, they did.
4) … did they? Yes, they did.
5) … didn’t they? No, they didn’t.
6) … didn’t they? Yes, they did.
7) … was it? Yes, it was.
8) … didn’t they? Yes, they did.