To separate the solids which are insoluble in liquids such that solid is heavier than liquid we should undergo the following process:

As far as we are aware, whether the procedures are solid-solid, liquid-liquid, or solid-liquid, they are all employed to separate mixtures of light and heavy particles. When a mixture of liquid and solid settles to the bottom, the liquid is drained out or the solid and liquid are separated using a simple filter paper.

As is well knowledge, a variety of procedures are employed to separate the various compositions and mixtures of heavy and light particles. These processes may entail the separation of particles into solid-solid, liquid-liquid, or solid-liquid phases. So let's discuss each of the above steps individually. Sedimentation is the first.
We are well recognised that a mixture of solid and liquid that has been left undisturbed for a long time can be separated into huge solid particles through the sedimentation process. The bigger particles would sink to the bottom, and when the liquid rose above them, it would seem clear.

Then there is decantation, which is taking the liquid produced by centrifugation or sedimentation and discarding the solid particles that dropped to the bottom.
The process of separating liquid particles known as evaporation occurs when water transitions from a liquid state to a gaseous state, also known as a vapour state. Condensation is the opposite process of evaporation and occurs when water's gaseous state returns to its liquid form.

Then there is filtration, which separates liquid and solid from a mixture and is roughly equivalent to sedimentation. However, in this procedure, filter paper is utilised rather than immediately decanting the liquid portion. While liquid goes through the filter paper, the insoluble particles stay above it.
As a result of the foregoing discussion, we may conclude that the techniques of sedimentation, decantation, and filtering can be employed to separate insoluble particles from liquids.

Thus, both options (A) and (C) are correct.