The researchers who have provided guidance for identifying the potential, foot clayey sand and sand clay found in western US is __________
(a) Macveren
(b) Holtz and Gibbs
(c) All of the mentioned
(d) None of the mentioned
This question was posed to me by my school teacher while I was bunking the class.
The query is from Collapsible Soils in portion Index Properties Determination of Geotechnical Engineering I