The answer would be A as larger states favored representation based on population because they would then have the most power
The definition of the US political parties have changed over the years.
Acc. Wikipedia
The GOP was founded in 1854 by opponents of the Kansas–Nebraska Act, which allowed for the potential expansion of slavery into certain U.S. territories. The party supported classical liberalism, opposed the expansion of slavery, and supported economic reform. Abraham Lincoln was the first Republican president.
Parties kinda switched.
The answer to your question is the Soviet union