What state of matter can easily be compressed (squeezed into a much smaller space)? * gases
solids
solids, liquids, and gases
liquids

gases.

Explanation:

gases have the highest volume. if you compress (increase pressure) a gas, the volume decreases and it will take up less space as a liquid, and if you compress more, the liquid will become a solid.

additionally info: this is generally true, but as you get into more difficult subjects, this rule does not hold. for example, some substances cannot obtain a certain phase of matter when they are a certain temperature and or pressure. but that could be way more out of this questions league.

d.7.5cm is your answer

i think the answer is a, hope this : )