Which of the following led to the growth of towns during the Middle Ages? A.
the need for craft guilds

B.
a greater number of merchants

C.
expanded trade

D.
demand for lumber

By the High Middle Ages, towns were growing again. One reason for their growth was improvements in agriculture. Farmers were clearing forests and adopting better farming methods. As a result, they had a surplus of crops to sell in town markets

so I think the answer would be C.expanded trades

. Another reason for the growth of towns was the revival of trade. Seaport towns, such as Venice and Genoa in Italy, served as trading centers for goods from the Middle East and Asia. Within Europe, merchants often traveled by river, and many towns grew up near these waterways.

Many merchants who sold their wares in towns became permanent residents. So did people practicing various trades

C.

answer; i believe that the correct answer is ( rivers);

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.