What was the Imperial Crisis, and what effect did it have on the fall of the Roman empire?

In the 3rd century, a serious crisis that had a huge influence on the disintegration of the Roman Empire. Taken by a territory of great proportions, the State was unable to maintain its political-administrative hegemony among the various peoples that were under its control. At the same time that the wealth obtained was immense, the problems and expenses were also manifested in a similar proportion.

The scenario worsened with the crisis of the slave system, triggered by the absence of new territories to be conquered and which, in turn, would guarantee the supply of the huge workforce that supported the Empire. As time went by, the lack of slaves determined a natural process of economic retraction, since landowners could not afford to explore all the land available for agricultural activity.

The rich and dynamic economy sustained by slave labor began to crumble progressively. Without strength, the Roman government would allow barbarians to enter its dominions, a large number of slaves would be freed by the retraction of the economy and the large plebeian mass, supported by the government, would lose its privileges. In the economic sphere, activities would abandon an articulated market and then turn to local subsistence.

Observing the triggering of these events, we see that the Roman Empire lost the fundamental characteristics that organized its own existence. In general, we see that over the decades, a large portion of those domains would be marked by other characteristics and practices in the cultural, economic and political spheres. The crisis was taking place, so that we could develop experiences that would mark the beginning of the Middle Ages.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.

can you explain a little further maybe give multiple choice? ?