WE CAN CONCLUDE FROM THE PASSAGE THAT________.A. THE SEA RESOURCES...

21. We can conclude from the passage that________.

A. the sea resources have largely been used up.

B. the sea, in a broad sense, has not yet been developed.

C. the problems that prevent US from fully exploiting the sea have already been solved

D. by the year 2000, the technology will be good enough to exploit all these resources