UA
The belief expressed inthe Declaration of
Independence that "just powers are derived from the
consent of the government" is best described as:
A. Natural Rights
B. Popular Sovereignty
C Social Contract Theory
D. Individual Rights/Liberties

I think D but here's a section that may help :)

Explanation:

The Declaration of Independence establishes the values of the United States of America. It says that "all men are created equal" and have the right to "life, liberty, and the pursuit of happiness." Further, it states the purpose of government is to protect these values.

one of the main reasons was definitely slavery. back in 1861, republican abraham lincoln was elected and ended up being a major influence in the slavery business. slavery greatly affected the texas economy because back in 1845 during the annexation of texas, slaves became a big part of the texas population. many texans that were in favor of the secession influenced groups through party ties.