Mark the letter A, B, C, or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 21 to 25.

a. Hoa: Yes, it's been built with the aim of promoting our tourism to become an attractive spot for domestic and international tourists!
b. Hoa: Have you ever been to Hoa Lu Ancient Town?
c. Alex: I haven't been there myself, but I know that it's a beautifully designed cultural and tourist destination in Ninh Binh.