5) most of the laborers who built the central pacific railroad were immigrants from which country?
a.
mexico
b.
china
c.
russia
d.
ireland
7) who invented the telegraph?
a.
samuel f. b. morse
b.
thomas durant
c.
jacob riis
d.
cyrus mccormick

d

explanation:

i think that this is the best answer, but im sorry if this is wrong

on november 6 and 7, 1917 (or october 24 and 25 on the julian calendar, which is why the event is often referred to as the october revolution), leftist revolutionaries led by bolshevik party leader vladimir lenin launched a nearly bloodless coup d'état against the duma's provisional government.