One drawback of voluntary trade is that it A. requires two groups to use a common language
B. can make one group dependent upon another for necessary goods
C. doesn't occur unless there is a shortage of goods for at least one group
D. forces groups to rely on themselves to produce all the goods they need

umm its well  i think maybe A

Explanation:

i just guessed plus me a 11 yeearold and its true

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.