Question

what most cemented the belief slavery was essential in america? (kc 3.6) *
the development of the cotton ginthe increased interregional slave tradethe 3/5 compromisethe decreased immigration and shortage of cheap labor
true or false: all men who owned enough property to vote were eligible to run for political office under the state constitutions created during the revolution. (kc 3.7)
truefalse

Explanation:

For the first question:
The cotton gin made cotton production much more efficient. This led to a huge increase in cotton cultivation in the South. And cotton cultivation was highly labor - intensive. Slaves were the main source of labor for cotton plantations. So, the development of the cotton gin cemented the belief that slavery was essential for the economic prosperity (especially cotton - based economy) of the South and by extension, in a sense, for America's economic fabric at that time.
The 3/5 Compromise was more about political representation (counting slaves as 3/5 of a person for representation purposes) rather than cementing the belief of slavery's essentiality. The increased inter - regional slave trade was a result of the demand for slaves (partly due to cotton gin) not the cause of the belief of its essentiality. Decreased immigration was not a major factor compared to the cotton gin in cementing the belief of slavery's essentiality.

For the second question:
During the Revolutionary - era state constitutions, while property - ownership was a requirement for voting in many cases, the requirements for running for political office were often more stringent. There were additional requirements such as higher property thresholds, residency requirements for longer durations, etc. So, not all men who could vote (based on property) could run for office.

Answer:

For the first question: the development of the cotton gin.
For the second question: FALSE.