What event led the united states to enter world war i?

a german u-boat sank a british merchant ship, the lusitania, killing 124 americans.
the united states learning about the holocaust
germany's victory over france
after the allied powers unsuccessful attempt to storm normandy beach

Actually my guess is the assassination of Archduke Franz Ferdinand

Brainliest please?

it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.  

it granted civil rights to african americans.