which of the following did the republican party support when it formed in the 1850s?\npopular…

Brief Explanations:

When the Republican Party formed in the 1850s, it was in part a response to the expansion of slavery. The free - labor ideology was central to its platform. Free - laborers believed in the dignity of work and the ability to advance through hard work without the competition of unpaid slave labor. Popular sovereignty was more associated with the Democrats in the pre - Civil War era as a way to decide on the slavery question at the state or territorial level. Lower taxes and reduced regulation were not primary issues for the newly formed Republican Party.

Answer:

free labor