According to the passage, what kind of crimes is increasing

A．There is no need to use a gun in killing a person.
B．Criminals can kill whoever they want by a computer.
C．The computer can replace any weapons.
D．The function of a computer is just like a gun.

A．the insect population increased greatly because most other animals were killed by the hot weather
B．compared with human beings and other species, insects prefer hotter and damper temperature
C．compared with previous weeks, the temperature in the fourth week of July declined a little
D．the insect population increased greatly because there should be a balance between life and death in the tropics