Which of the following regions in the world will witness the sharpest drop in life expectancy

A．expand and improve the existing subway system.
B．build underground malls and parking lots.
C．prevent further land subsidence.
D．promote advanced technology.

A．He had excellent academic records at school and university.
B．He was once on a PhD programme at Yale University.
C．He received professional training in acting.
D．He came from a single-parent family.