Read the following paragraphs and complete the statements. Choose the best answer based on the information in the paragraphs.

There are more than 4,800 different kinds of frogs. There is a wide range of colors and sizes of frogs. Some frogs are less than an inch long, but some are a foot long. They can be found all over the world, except for the West Indies and islands in the ocean. Although there is a lot of variety, all frogs have horizontal pupils and webbing between their toes.

These two characteristics are ________ among all frogs.

A. poisonous
B. absent
C. similar
D. pointless