An ape has a larger brain than any animal except man, though it is much smaller than a man's brain. Apes all belong to the hot countries of the world--tropical Africa and South--east Asia.     The gorilla is the largest of the apes. He is as tall as six feet when standing upright. Many people think that gorillas are very fierce. They are often described as standing upright like a man, beating their fists and roaring. In their home, in the forests of Central Africa, however, they are not at all like this, They are peaceful animals and never use their great strength unless attacked. Even then, they retreat if they can.     Gorillas have black faces and long, black, hairy coats. They feed during the day on plants and fruit. At night the old male often sleeps on the ground at the foot of a tree, while the others each make a sleeping platform in the tree bending the leafy branches. Besides this, gorillas climb trees very seldom. During the night gorilla usually sleep in trees except   _   .
the old female gorilla the old male gorilla the young gorillas up to six years old the baby gorillas
Question: An ape has a larger brain than any animal except man, though it is much smaller than a man's brain. Apes all belong to the hot countries of the world--tropical Africa and South--east Asia.     The gorilla is the largest of the apes. He is as tall as six feet when standing upright. Many people think that gorillas are very fierce. They are often described as standing upright like a man, beating their fists and roaring. In their home, in the forests of Central Africa, however, they are not at all like this, They are peaceful animals and never use their great strength unless attacked. Even then, they retreat if they can.     Gorillas have black faces and long, black, hairy coats. They feed during the day on plants and fruit. At night the old male often sleeps on the ground at the foot of a tree, while the others each make a sleeping platform in the tree bending the leafy branches. Besides this, gorillas climb trees very seldom. During the night gorilla usually sleep in trees except   _   .
A. the old female gorilla
B. the old male gorilla
C. the young gorillas up to six years old
D. the baby gorillas
Answer: