Context: Reptiles are a group of animals with similar traits. The following traits can be used to identify reptiles:
They have scaly, waterproof skin.
They make eggs with shells. Observe the animals and read the descriptions.
Select the one animal that has all of the reptile traits listed above.
A. American green tree frogs have moist, smooth skin and lay eggs with no shells. They live underwater for the first part of their lives. As adults, they live on land near ponds or swamps. Adult male American green tree frogs have a loud mating call.
B. Cobras hatch from eggs with shells. They have a wide, flat hood. A cobra can display its hood to scare away a predator. Like the rest of its body, the hood is covered in waterproof scales.
Determine the correct option from the provided choices and reply with its corresponding letter.

B