Answer:
C. Jet engine
Explanation:
Reasons:
common sence nun of the other ones would be useful during world war ||
it was invented 1791, 1928
Fredrick Douglass though it was inmortant for African Americans to fight in the war because.....They were slaves...well some werent but they had to be on the <span>confederete side because there color people were slaves.
Hope This Helps ☺</span>
Its the Gold Rush which occured in 1848.
That would be in an o<span>ligarchy. </span>