Answer: a. expropriation
Step-by-step explanation:
Expropriation happens when privately owned property are forcefully taken by government for it to be used by the general public. It is an act of depriving people of their right to property, although expropriation is to the advantage of the general public. In most countries especially in the US expropriation occurs when there is a need to embark on certain infrastructural project such as airports, railroads, etc.