Officials believe that ________ are responsible for the destruction of nearly 20,000 square kilometers of jungle.

A．China has delayed its purchasing plan because of the collision of a US spy plane and Chinese fighter jet last month
B．Boeing has got confirmation of the orders from Beijing
C．Boeing will not cut its production despite of its economic tension
D．China’s plan to purchase the planes appears to be on track

A．China's going to reduce the airliners to be purchased from Boeing
B．China's plan to buy Boeing jet liners has been suspended because of political tension between Washington and Beijing
C．China wants to increase its buying
D．China will move on with its purchasing plan