What is the main argument made by Albert O. Hirschman in his book 'The Strategy of Economic Development'?

A. That underdeveloped countries should focus on small-scale investments in a single sector
B. That balanced growth through simultaneous, large-scale investments across multiple sectors is the key to economic development
C. That unbalanced growth, which creates 'imbalances' and 'pressure points', is a more effective strategy for economic development
D. That economic development can only be achieved through foreign aid and investment
Answer: 