According to a ratio, by which year 70 percent of the world's population will be confined to cities, that is-

According to a ratio, by which year 70 percent of the world's populati

1.	According to a ratio, by which year 70 percent of the world's population will be confined to cities, that is-
A.	2040 ,
B.	2050 ,
C.	2060 ,
D.	2070 ,
Answer» C. 2060 ,