4) The findings of the study mentioned in the highlighted text, if valid for rain-forest regions in general, suggest that which of the following is an obstacle most likely to be faced by those wishing to promote rain-forest preservation by implementing the proposal mentioned in line 1?A. Lack of legal property rights tends to discourage local farmers from investing the time and resources required to successfully implement new agricultural technologies.
B. The ability to evaluate the wider economic ramifications of adopting new aricultural technologies depends on a relatively high level of formal education.
C. Isolation from the market economy tends to restrict local farmers’ access to new agricultural technologies that could help them to increase their productivity.
D. Ready availability of uncultivated land tends to decrease local farmers’ incentive to adopt new agricultural technologies that would reduce their need to clear new land for cultivation.
E. Traditions of self-sufficiency and reliance on kinship ties tend to diminish local farmers’ receptivity to new agricultural technologies introduced by people from outside the local community.
This is what the first line says "One proposal for preserving rain forests is to promote the adoption of new agricultural technologies"
The proposal is to adopt new agricultural technologies.
This sentence "but availability of uncultivated land reduced the incentive to employ the productivity-enhancing technologies" connects to (D) perfectly. What confused you was perhaps this - "that would reduce their need to clear new land for cultivation"
This is just some info on new technologies which links to the first part of (D) - ready availability of land. Since land is readily available, new technologies (which help to reduce the need to clear new land) are not needed. When land is limited, these technologies would help since they would reduce the need for new land (if you can increase the productivity of current land using tech, you wouldn't need new land much). When land is available, these technologies would not be required.
A. Lack of legal property rights tends to discourage local farmers from investing the time and resources required to successfully implement new agricultural technologies.
"Household’s duration of residence in its village" was considered, not "legal property rights".
B. The ability to evaluate the wider economic ramifications of adopting new aricultural technologies depends on a relatively high level of formal education.
Rain-forest regions are relatively isolated, self-sufficient communities with ample land - not tied to a market economy. So economic ramifications are irrelevant.
C. Isolation from the market economy tends to restrict local farmers’ access to new agricultural technologies that could help them to increase their productivity.
Rain forest regions are usually economically isolated so this is not a factor that influences whether the farmers use new technologies.
E. Traditions of self-sufficiency and reliance on kinship ties tend to diminish local farmers’ receptivity to new agricultural technologies introduced by people from outside the local community.
Incorrect. Given that "longer residence (reliance on kinship) correlated with more adoption of improved plant varieties but less adoption of chemical herbicides."
So they are more receptive to some new tech and less receptive to other new tech.