( IX ) Stupid acts may lead to dangerous accidents.One day, a boy who was playing in a park alone felt dull.He heard the birds sing and came up with an idea. Hehid himself in a tree and waited someone who mighttake a seat under the tree.       A few minutes later, there came an old man, who felttired and sat down on the seat. The boy was excitedabout it. He shouted loudly. The old man really gotscared. However, the boy was too excited to hold thetree and fell down from the tree. He found himself in thehospital the next day. His parents told him that an oldman called the police and helped take care of him untilthe    ambulance    came.
41. Why did the boy hid in the tree?
(A) He tried to catch birds.
(B) He felt dull sitting under the tree.
(C) He wanted to scare people.
(D) He needed someone’s help.