Context: Mammals are a group of animals with similar traits. The following traits can be used to identify mammals:
They feed their offspring milk.
They have fur or hair. Observe the animals and read the descriptions.
Select the one animal that has all of the mammal traits listed above.
A. Black howler monkeys have loud calls, or howls. The howls can be heard over three miles away! Howler monkeys have fur and feed their offspring milk.
B. Smooth newts have moist, smooth skin with black spots. Young smooth newts hatch from eggs without shells. They live in streams or ponds until they are about ten weeks old. Then, they crawl onto land.
Answer with the option's letter from the given choices directly.

A