Read the following passage and m...

Câu hỏi: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42. 

A. To convince the reader to buy a homing pigeon

B. To inform the reader about homing pigeons and their training

C. To protect homing pigeons against the threat of extinction

D. To encourage the owners of homing pigeons to set the birds free