23. Ethan: How was your vacation in the Netherlands? I heard you visited the floating farm in the Rotterdam port!
Sandy: Fantastic! It's actually the world's first floating dairy farm. The farm suddenly becomes well-known worldwide.
Ethan: I'm planning a week's paid vacation in Europe.
Sandy: Look at this photo. Visitors are watching cows making milk on the water platform! The floating farm is now home to cows that live and graze on the farm.

(A)Have your family gone swimming in the ocean?

(B)Would you talk about the shrinking land problem?

(C)Are flower products out of stock in the Rotterdam port?

(D)Could you show me why the tourist spot is popular?