Discussion
Socio-economic Impact Assessment of proposed project can be best interpreted by :
Answer: B
The keyed answer is Rational threshold value (RTV).
The rational threshold value is a named technique for judging whether the socio-economic effects of a proposed project are significant. It appears in the US Army's Economic Impact Forecast System, whose users' manual lists the Rational Threshold Value and Forecast Significance of Impacts techniques as the tools used to measure the "significance" of forecast changes in a region's economy. The forecast change in a socio-economic indicator is compared with a threshold based on how much that indicator has normally varied in the area, so a change inside the normal range is read as not significant and one outside it as significant.
I could not find any standard EIA source that defines an "absolute", "critical" or "normal" threshold value as a named method for social and economic impacts, so options A, C and D are rejected because they are not recognised techniques, not because their definitions were checked. I confirmed that RTV exists as a socio-economic significance method, which is why the official key is kept.
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