The Geneva Conference was a conference among several nations that took place in Geneva, Switzerland, in order to settle outstanding issues resulting from the Korean War. On Indochina, the conference produced a set of documents known as the Geneva Accords. These agreements temporarily separated Vietnam into two zones, a northern zone to be governed by the Việt Minh, and a southern zone to be governed by the State of Vietnam, then headed by former emperor Bảo Đại.
"They promised bills and laws in favor of immigrants in exchange for votes" is the one way among the following choices given in the question that political machines, such as Tammany Hall, work with and for immigrants.
<span>"to attract the Confederate States to Join the Union" would be your answer
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