D.helped commissioners better understand and solve the
problems in their specific industries.
Appointing regulators that understood their industry is
important as they have the knowledge and understanding that can help them solve
the challenges in that industry. This ensures that the industry is better
regulated to the benefit of the public.
We know this by dating the structures, evidence of life there long before anywhere else and by the Bible. You can also look into other sources of history too. There is a ton of info on Egypt provided by scrolls a old writing on stone tablets.
The idea that a country or region should specialise in making and exporting goods and services that it can produce most efficiently.