In 1980s, many manufacturing industries were increasingly confronted with ____________________.

A．He can’t explain some concepts of engineering.
B．He regularly gives talks to high school students.
C．He doesn’t want the woman to postpone the talk.
D．He hasn’t finished preparing for his presentation.

A．When to move.
B．Where to live the following year.
C．How much time to spend at home.
D．Whose house to visit.