What are the criteria of population for sub-metropolitian and metropolitian cities?​

Criteria for Sub Metropolitan City A city with a population of not less than 100K is the prime requisite for this criterion. Annual income needs to be more than 100 Million. There needs to be a good infrastructure, Communication, Electricity, and Drinking water.

Explanation:

the answer is:

c. economic output

it should be d or b but i'm sure it's d