In general, the most materially advanced and developed countries are focused on extensive development of the material production sector of their economy, but not always.
Considering the fact that Europe before the renaissance period was empty in most places due to plagues and poor living conditions once things slowly started to get better people started living in cities again and in larger populations so I believe the answer is A.
Photographs help historians learn about the past by visualize the area or situation and the things present in that time.
<u>Explanation:</u>
With seeing the pictures of the time, the historians want to know about, they can learn about that time by seeing that area and the things which were used by the people of that area.
Photographs of an area help us to gain a deeper insight of that area and they are more useful to us when compared to reading texts about that time and area. They also helped us to learn about how people used to deal with the problems.
For his domestic program called "The Square Deal" which he hoped to start conservation of natural resources, control of corporations, and consumer protection.
Kansas-Nebraska Act received the strongest Southern support.
