What piece of technology has had the greatest impact on humankind? Explain your thinking.

When did this piece of technology start changing the way of living and how?

This is only if you want to do it. It's not graded or anything. Just have fun doing it

hello.  

answer ir: bush stirs up emotions of brotherhood and freedom to inspire americans.

however, you could u provide the whole options so as to verify : )

hope it .

i believe it may be the hope this sorry if i'm wrong.

the answer is b "spewing black smoke", i took the test and got 100%   hope i