In which place are you likely to find the highest percentage of people employed in the tertiary sector?

The tertiary sector is the sector that is not the sector producing raw materials nor the sector manufacturing them. but do have customers and includes what is known as the "Service Industry". Since it does not produce nor manufacture, the highest percentage of people employed in this sector are more likely found in urban areas. Typical examples of this sector includes restaurants, insurance companies, retail stores, etc.

d is definitely the answer