It has been forecast that, by the middle of the tw...

Câu hỏi: It has been forecast that, by the middle of the twenty-first century _____.

A. various measures will have been taken to encourage population growth

B. the world population will be stabilized at around 10 to 15 billion

C. the population growth rate in less developed countries will be much higher

D. the rate of population increase will have doubled the 1950 rate