What is the objective of this research project?
To evaluate the changes in volumetric behavior of highly plastic clays modified with rice husk and fly ash.
To improve the physical, mechanical, dynamic, and chemical properties of highly plastic clay.
To reduce soil expansion and improve the correlation coefficient between Mr and C.B.R. for pavement subgrade soil support.

a) Only item 1 is correct.
b) Only item 2 is correct.
c) Items 1, 2, and 3 are correct.