Correct Answer - Option 1 : Increase
Explanation:
For undisturbed low to medium sensitivity soils, the coefficient of compression or compression index (Terzaghi and Peck empirical index)
Cc = 0.009(LL - 10)
For disturbed low to medium sensitive soil (Skempton's empirical index)
Cc = 0.007(LL - 10)
So, If the liquid limit is increased then, the compression index of soil will increase.