It is indicated by kidnapping has become big business in many parts of the world that ______
A．kidnapping has become the most profitable business in many parts of the world
B．there is a worldwide increase in kidnappings and many groups have make profits in kidnaps
C．by kidnapping the kidnappers have established their corporations in many parts of the world and earn big money each year
D．in many parts of the world more people have become kidnappers