Concept:Commerce grows when there is enough production, strong demand, and good purchasing power in an economy.
Explanation:Modern production methods increase the supply of goods and services in the market.
Government participation in business provides support, rules, and infrastructure that encourage trade.
A high population growth creates a larger number of buyers and sellers, thereby increasing market activity.
Low per capita income means that, on average, each person has very little money to spend.
This reduces demand for goods and services because most people cannot afford to buy them.
When effective demand is low, producers, wholesalers, and retailers cannot expand their trade easily.
Therefore, low per capita income does not support or enhance commercial growth.
Answer:D. low per capita income