How did the Brundtland Commission (1987) define sustainable development ?
A. development that protects the environment for future generations even at the expense of the present generation
B. development which meets the needs of the present generation without compromising the ability of future generations to meet their own needs
C. a type of development which put the interests of develog countries ahead of the interests of the rich nations
D. development that is capable of maintaining sustainable economic growth for all countries of the world