Which factor has contributed to India's economic struggles?

not investing in productive capital
poor soil for farming
a poorly developed infracstructure
isolation from other countries

All of the factors listed have contributed to India's economic struggles, but one major factor is a poorly developed infrastructure. India has faced challenges in developing and maintaining its roads, railways, ports, and power supply, which hinders the movement of goods and services and increases transaction costs. This can limit economic growth, make it difficult for businesses to operate efficiently, and deter foreign investment.