The state of matter that is easily compressible is C) Gas.
Gases are composed of particles that are far apart from each other compared to solids and liquids. This significant distance between particles allows gases to be compressed easily when pressure is applied. In a gas, the particles move freely and rapidly, which makes them able to occupy any available space. For instance, when you press down on a balloon, the air inside can be compressed into a smaller volume.
In contrast, solids have tightly packed particles that are held together by strong intermolecular forces, making them rigid and not easily compressible. Liquids also do not compress easily; while the particles are somewhat less tightly packed than in solids, they are still close enough that there’s not much space to squeeze them together without applying a lot of pressure.
Plasma, on the other hand, behaves similarly to gases under many conditions and can also be compressed, but it typically exists at very high temperatures and may not be as easily compressible in a practical sense.
In summary, gases are the most compressible state of matter due to the large spaces between their particles, which allows them to be squeezed into a smaller volume without much resistance.