We can reasonably conclude from the passage that______.
A．the world telecom market has been fully explored since the signing of the WTO pact
B．telecom companies of the U.S. and U. K. will undoubtedly dominate the world telecom market
C．many governments have granted a great investment in their telecom business
D．the WTO pact means tougher competition for telecom companies and gentler price for callers