Answer:
It was David Livingstone who was the first to cross the African continent. He did so under great amounts of danger and would eventually die a mysterious death in Africa.
Explanation:
there then
False
They had been used before that. they were simply intergrated to the computer programming system after along period. the power symbol was developed in ww2.
Nostalging-
OMG JUST SAW AN OLD DUNKAROOS COMMERCIAL IM NOSTALGING
Just a guess
The two inventors that contributed to the rise of the railroad industry was Andrew Carnegie and Thomas Edison. The correct answer is A.