According to the passage, one rule of bungee jumping is that you______.

A．make complete new roles in every area of International trade
B．have more members and settle more problems
C．take the place of the World Bank and the International Monetary Fund
D．have new roles covering trade in services and intellectual property

A．a world that exists only in one's imagination
B．the bright future that one is looking forward to
C．the state of uncertainty before one's final goal is reached
D．the beautiful land one often dreams about