Concept:The IBRD primarily provides long-term financial assistance for reconstruction and development projects.
Explanation:The International Bank for Reconstruction and Development was created to support countries after the Second World War.
Its main aim is to grant long-term loans for productive projects such as infrastructure and development.
These loans help member countries rebuild their economies and promote long-run growth.
Short-term balance of payments support is handled by the IMF, not the IBRD.
Thus, providing long-term loans for infrastructure best matches the IBRD's principal objective.
Answer:C. grant long term loans for infrastructure