D. Tinker field
It was named after Major General Clarence Leonard Tinker.
Answer:
World War.
Explanation:
First world war ended in 1918.
The Columbian Exchange lead to an increase in the demand for skilled labor in Europe, because D) an abundance of raw materials from the new world needed to be made into finished goods. Many raw materials and new products were brought over to Europe from the Americas which needed to be made into finished products.
