Letter B is wrong I took the unit test on E-2020 the correct answer to the question is A.
The answer you are looking for is Chief Joseph.
Please mark branliest.
-Austin <3
Answer:
By January 1879, at his laboratory in Menlo Park, New Jersey, Edison had built his first high resistance, incandescent electric light. It worked by passing electricity through a thin platinum filament in the glass vacuum bulb, which delayed the filament from melting.