Instruction: Identify the assumptions that must hold for the statement to be valid, then choose the correct option.
Statement: Urban sprawl, which leads to the expansion of cities into rural areas, often results in the loss of biodiversity, fragmentation of ecosystems, and increased pollution, thereby posing a significant challenge to sustainable development.
Assumptions:
I. Urban sprawl contributes to the degradation of natural ecosystems.
II. Sustainable development can be achieved without considering the impact of urbanization on ecosystems.
III. The expansion of cities results in the destruction of biodiversity and environmental degradation.