阅读下列短文，从每小题所给的A、B、C、D四个选项中选出一个最佳选项。

My name is Nana. I'm a very big animal. I live in a zoo in the UK. I have a long neck （脖子） and long legs. I eat leaves on the trees. Do you know what animal I am?

I'm Bob. I live in a zoo in Thailand. Many people like my friends and me because we're clever and friendly, but some people like us because of our ivory.

I'm Ann. I live in Australia. I am not very big. Many people come to the zoo to see me. I sleep a lot every day, but that's not because I'm lazy. I need a lot of sleep to help me conserve energy （保存能量）.

My name is Beibei. I am in a zoo in America now, but my home is in China. I'm black and white. Bamboos are my favorite food. Everyone says I'm cute. Do you like me?