A. industrial development
B. improved medical services
C. high demand for manufactured goods
D. efficient transportation system
Correct Answer:
Option D – efficient transportation system
Explanation
Answer is A people in the rural area migrate to the urban area mainly to improve their living standard by working in industries rather than farming and petty trading which is the main income source in rural area. improved medical source brings about urban migration but not or larges scale transportation system is just a means of connecting the urban rural areas and it just brings about quick delivery of goods
