Final answer:
Hernando de Soto is known as the first European to travel extensively through southeast North America. The introduction of firearms had the greatest impact on Native Americans. 1.The correct option is B. 2. The correct option is A.
Step-by-step explanation:
1.The first European to extensively travel through what is now southeast North America was Hernando de Soto. He was a Spanish explorer who led an expedition through the southeastern United States in the early 16th century.
2.The factor brought by the Europeans that had the greatest impact on the Native Americans was Introduction of firearms. The introduction of firearms drastically changed the balance of power between Native American tribes and made it easier for Europeans to conquer and control Native American lands.
Other factors, such as new farming techniques, spread of Christianity, and development of written language, also had an impact on Native Americans, but the introduction of firearms had the greatest and most immediate effect. 1.The correct option is B. 2. The correct option is A.