I would love to help you but you have to let me know what book the questions are asking about.
In the 15th century, Europe sought to expand trade routes to find new sources of wealth and bring Christianity to the East and any newly found lands. This European Age of Discovery saw the rise of colonial empires on a global scale, building a commercial network that connected Europe, Asia, Africa, and the New World.
Germanic tribes such as the Franks, Ostragoths, Vandals and the Visigoths were surrounding it and weakening it by spreading into their territory, and also it was having internal governmental issues and struggles for consolidation of power.
The correct answer is: "the domestication of animals "
Although it was baptized by a change in the way of working the stone, the Neolithic is a complex phenomenon that marks the end of predation as a way of life and the beginnings of agriculture and livestock.
About 12,000 years ago, the way of life of the human beings that inhabited certain geographic zones began to transform radically. Predatory occupations, such as hunting and gathering, were replaced little by little by others of a productive nature, such as the domestication of animals and the cultivation of the land and, in this way, the societies of Homo sapiens gradually abandoned nomadism and subsistence economy to become sedentary and producers of their own food.
The answer is C. Capitalism.