Why did deep water in the harbors of the Saudi Arabia help trade to take place as early as 3,000 B. C.E?

i think it's b or c hope this

i believe the answer is: returns on investments, no wages

people who belong in upper class society would most likely get there by obtaining multiple source of income, which a certain percentage of ownership for businesses. since most of them are job creator, they would most likely get their money from profit, not wages.

answer; software failure, and human error;