The word "alleviate" (Paragraph 2) is nearest in meaning to ______.

A．there will inevitably be a heated debate over the general application of recombinant DNA technology
B．the use of the recombinant DNA technology on human beings will be forbidden
C．the recombinant DNA technology can be traced back to hundreds of years ago
D．serious dilemmas may be generated when recombinant DNA technology is used to modify human genetic code

A．It can bring about rapid and radical genetic changes in life forms.
B．It can be used to restructure DNA molecules to produce new desired plant and animal breeds.
C．It may increase the risk of producing some unexpected diseases.
D．It proves an effective way to cure cancer and other incurable diseases.