A Developing Country in Tropical Regions Is Likely to Have

A developing country in tropical regions is likely to have rainforest which could easily be overexploited for lumber, initially, and then converted to farms. How could this be prevented in a practical way?

A) It can't. People will take short-term advantage of whatever resource they have.
B) Simply make it illegal to log and provide social welfare to support people.
C) Fence off as much of the rainforest as possible to keep people out.
D) Wealthy countries can just buy up the forest and preserve it.
E) Organize businesses to take advantage of interest in ecotourism in these unique and interesting habitats.