Answer:
- d - He influenced political leaders and thinkers of the time period.
- b - Acquiring Spanish territories in the Pacific and Caribbean provided the U.S. with strategically located naval bases.
Step-by-step explanation:
1. The impact of Frederick Jackson Turner on the United States is that he influenced political leaders during the 20th century. Frederick Jackson Turner was a historian and popularly known for his “Frontier thesis”. He was based at the University of Wisconsin and later moved to Harvard in 1910.
2. The US victory in the Spanish American War resulted in the Us gaining possession and/or control of many new territories. These and other territorial gains resulted in the creation of a new far flung empire.