I think the answer will be B. sliver and A. gold
With the expression "greek miracle" we designate the appearance scientific knowledge, their achievements include great greek personages who had achieved really big disciplines like literature, history, geometry, mathematics, philosophy, etc, in the other hand the culture has also took biblical sources, which means accumulated knowledge in the sacred scriptures. so that's how Sumerian's achievements spread to other lands.
<span>Many intellectuals and many of those working in development believe that the size of the world's population and its accelerated growth is the greatest problem and the gravest threat to humanity. Clearly, the ratio of the number of people to the amount of food available has an impact on nutrition, but how do these two factors interact? At the end of the eighteenth century the British political economist Thomas Malthus speculated that population growth could soon surpass production and food supply. By the end of the twentieth century, this had not happened, but malnutrition was widespread.</span>
Hippocrates Study Medicine :)