+50-point quiz: Delhi is the capital city of .
London is the capital city of .
Washington, District of Columbia, is the capital city of .
Canberra is the capital city of .

1. north-central India

2. England and the United Kingdom.

3. united states

4. the Commonwealth of Australia.

Explanation:

answer; eliminate parking problems in cities, because a car took up only half as much space as a horse and buggy;

answer; the edward snowden leaks of nsa classified material;