Correct Option (C)
The passage highlights that developed countries have begun to alleviate the worst effects of unsustainable patterns by investing in public transport and infrastructure. Therefore, offering loans to developing countries for improving their public transport aligns with adopting sustainable solutions and supports their transition towards sustainable human development.
The text identifies the unsustainability of production and consumption patterns as the main threat to human development. It explicitly states that developed countries need to support developing countries' transition to sustainable human development. This support inherently involves enabling developing countries to change their current production and consumption patterns to more sustainable models.
Incorrect Options:
The passage mentions that developing countries are hampered by the high costs and low availability of clean energy sources. However, it does not explicitly state that developed countries should provide clean energy at a low cost. The call is for broader support in the "transition to sustainable human development," without specifying this particular method of provision.