Answer:
O A. frequency.
Explanation:
Intensity is how stressful the thing is while duration is how long it lasts. Stress is just what it is, and frequency is how often it repeats itself, that is, the rate at which it repeats. Every time it repeats it has its intensity and duration.
Concepts of World City includes geographical dispersal of economic activities, increase the number of share for global firms, improvement of firms such as accounting, legal, public relations, programming, telecommunications, enhancement of production, maintain economic stability and improvement of the global network of affiliates.
It's 7 kilometres from earth in light years
E Both A & C, need an explanation?