Which situation is considered a cause of the other three?
(1) Development of a European middle class
(2) Increase in European demand for Eastern goods
(3) European renewal of interest in learning
(4) European involvement in the Crusades
Answer: Option 4
Step-by-step explanation:
The other points which are given in the question are the situations which had happened because the Europeans had involved them selves in the crusades.
The effects of this involvement was the development of the middle class in the society. It also led to the increase in the demand of the eastern goods by the people of Europe.
More over the people of Europe had developed new interest in learning. All this had happened because the Europeans had involved themselves in the crusades.