Statement I: The theory of Unbalanced Growth was indeed advocated by Albert O. Hirschman. He is the most prominent figure associated with this development theory. Statement II: The theory proposes that deliberate imbalances in investment across different sectors can stimulate growth. By investing heavily in specific 'leading' sectors with strong forward and backward linkages, it creates bottlenecks and pressures that induce investment in other 'lagging' sectors, thus propagating growth throughout the economy. The concept of forward and backward linkages (e.g., investment in steel industry creates demand for iron ore and coal (backward) and facilitates industries using steel (forward)) is central to this theory.