Which type of boring is best suited for obtaining undisturbed samples...

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Which type of boring is best suited for obtaining undisturbed samples?

A. Wash boring

B. Auger boring

C. Rotary drilling with core barrel

D. Percussion drilling

Answer: Option C

Rotary drilling with a core barrel enables the retrieval of undisturbed samples of rock and sometimes stiff soils, ideal for strength tests.

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