They practiced subsistence farming to provide just enough food for themselves
i believe the answer is a :)
During<span> the high </span>Middle Ages<span>, the </span>Roman Catholic Church<span> became organized into an elaborate hierarchy with the pope as the head in western Europe. He establish supreme power.</span>
<span>a. Italian city-states were wealthy because of their various ports which brought the wealth and ideas to Italy from around the known world.</span>