动物特征描述 — 英语选择题

海洋馆的小讲解员在介绍蓝鲸。下面哪一句对动物特征的描述是完全正确的？A. The blue whale is bigger. It has a bigger body. B. The blue whale is big. Dolphins are small and fast. C. The blue whale is long. Sharks are more small. D. Whales can swims fast in the ocean. （蓝鲸很大。海豚又小又快。）