The correct options are
A Solid
C Gas
Gases are highly compressible because it is less dense than other states of matter. Its intermolecular force of attraction is less and it has more space between the molecules. Therefore, it is easy to compress the gas.
Solids are almost incompressible. This is because the intermolecular force of attraction in solids is greater compared to other states of matter. The moles in solids are tightly packed. Therefore, solids are almost incompressible.