Context: Amphibians are a group of animals with similar traits. The following traits can be used to identify amphibians:
They spend part of their lives in water and part on land.
They have moist skin.
They make eggs with no shells. Observe the animals and read the descriptions.
Select the one animal that has all of the amphibian 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. Chinese alligators live in lakes and streams in eastern China. They lay eggs with shells and live in underground burrows in the winter. Chinese alligators have scaly, waterproof skin.
From the given choices, select the correct answer and reply with the letter of the chosen option.

A