Read the following text and answer the questionsGiraffe is the higthest animal in the world. Its height can reach 4.8 to 5.5 meters and its weight about 1360 pounds. Giraffe has a unique characteristic. They have a very long neck and two small horns on its head. Giraffes have big brown eyes and protected by thick and long eyebrows. Her body is covered with a unique pattern that is attached by brown spots all over their body.
Just like camels, giraffes can survice without dringking for long time because girareffes can rely on the water contained in leaves they eat. Giraffes are very selective in choosing food. They always eat young leaves that grow in the tree tops. Their tongue shaped like a knife help them to cut branches which very hard.
Female giraffe can start pregnant the age of five years, with a gestation period of 15 months. Commonly female giraffe bear one baby, but sometimes two babies at once. Giraffes bear its baby with a standing position. When the baby is about to be born, they just it to the ground from a 1.5 meter of height. Baby giraffe can stand with about 20 minutes since being born, and begin breastfeeding within an hour of birth.
The unique characteristic of giraffe is?

a.Two horns on its head

b.Their long neck

c.Brown spot

d.Their food​