Which the following statements is true according to the passage？A．The United Nations says

Which the following statements is true according to the passage？

A．The United Nations says about 50 million acres of rain forests are cut down every year.

B．Luckily people and mass media all paid special attention to the depletion of rain forests.

C．The author thought the oceans' survival is questionable.

D．People have stopped cutting down rain forests because of the opposition of most people.