In the late 1800s, what new technology nations build and maintain their empires? a. machine gun b. railroad c. telephone d. telegraph

In the late 1800s, machine guns helped nations build and maintain their empires.

in the declaration of independence, thomas jefferson announced that every human being has “certain unalienable rights,” among which are those to “life, liberty, and the pursuit of " hope i

the answer would more than likely a.)falling crop prices  

hope the answer is right and ,either way have a nice day.