Context: Monotremes are a group of animals with similar traits. The following traits can be used to identify monotremes:
They make eggs with shells.
They have fur or hair. Observe the animals and read the descriptions.
Select the one animal that has all of the monotreme traits listed above.
A. Hippopotamuses have small hairs near their mouths and ears, but most of their skin is hairless. Their skin makes a reddish-brown substance that acts like sunscreen! Hippopotamuses give birth to live offspring.
B. Platypuses have fur and a rubbery bill that looks similar to a duck's beak. A platypus uses its bill to find food. Young platypuses hatch from eggs. After hatching, they drink milk from their mother.
Select the correct answer from the provided options and reply with the letter associated with it.

B