Mark the only true statement according to lines 25-36....

A

Only 2.5 billion people lived in large cities fifty years ago.

B

Global population has increased enormously in the last half-century.

C

Throughout history poor cities have developed faster than rich ones.

D

The continuous impoverishment of the countryside led to scientific advances.

E

Thanks to modern medicine the poorest cities can grow as fast as the richest ones.