According to the report 'Saving Our Vanishing Heritage', what are the five accelerating man-made threats facing global heritage sites in developing countries?

A. Urbanization, migration, technological advancements, cultural assimilation, and economic instability
B. Climate change, natural disasters, economic downturn, lack of awareness, and population growth
C. Development pressures, unsustainable tourism, insufficient management, looting, and war and conflict
D. Poverty, inequality, corruption, lack of education, and environmental degradation
Answer: 