Context: Read the text about kangaroos.
Kangaroos are unusual-looking animals. But their funny-looking bodies help them survive in the wild. Thanks to their strong back legs, kangaroos can jump up to thirty feet high. They also pound their long feet and big tails on the ground to warn other kangaroos of danger.
Kangaroos use their short arms to defend themselves against each other or dangerous animals, such as wild dogs. Some people call kangaroos boxers because of the way they hold their arms when they fight. Kangaroos also sometimes lick their arms on hot days. They do this to cool off. From head to toe, kangaroos use what they have to stay safe and comfortable in the wild.
Why are kangaroos called boxers?
A. because of how they use their arms to fight
B. because they lick their arms before fighting
C. because they have strong back legs
Identify the correct choice from the options below and respond with the letter of the correct option.

A