Concept:Commerce grows when production, demand, and purchasing power in an economy are strong.
Explanation:Modern production methods increase the supply of goods and services.
Government participation in business expands trade activities and infrastructure.
High population growth creates a larger market for goods and services.
However, low per capita income means people have less disposable income.
This lowers effective demand and weakens the expansion of commerce.
Therefore, low per capita income does not enhance commercial growth.
Answer:D. low per capita income