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Which method is most suitable for detecting shallow subsurface cavities

This question belongs to Geological Engineering Site Investigation And Geotechnical Exploration
Site Investigation and Geotechnical Exploration
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Which method is most suitable for detecting shallow subsurface cavities?

Answer & Solution
Correct Answer: Option B
Electrical resistivity detects anomalies in subsurface resistance, useful for locating voids, cavities, or buried channels.
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