WHICH OF THE FOLLOWING IS NOT MENTIONED IN THE ARTICLE
38.Which of the following is NOT mentioned in the article?
A.In New York’s Zoological Garden, people can see nocturnal animals.
B.In modem zoos, many of the iron bars have been replaced by moats.
C.Modem zoos can be built in a desert to save endangered desert species.
D.Animals from polar environments can be kept in modem zoos.