Context: Mammals have hair or fur and feed their young milk.
Mammals are warm-blooded. Warm-blooded animals can control their body temperature.
A koala is an example of a mammal.
Select the mammal below.
A. brown tree frog
B. red crowned crane
C. great white shark
D. red kangaroo
Determine the correct option from the provided choices and reply with its corresponding letter.
Answer: D