The answer should be D as Tesla was a compelling scientific figure indeed. He wanted to provide the electricity to the world for free.
If the Native Americans moved west the states would gain Power, Population, and wealth. Also he said that it would make the Native Americans free from the states that they were currently living in.
The answer is: He invented and sold a mechanical excavator.
Resourceful means having the capability to achieve fast and intelligent manners to overcome difficulties. Synonyms of resourceful are ingenius, inventive and enterprising. As a result, the fact that he invented and sold an automated excavator demostrates his innovative ability to create something practical and helpful.
