How was the demand for labor on the "slave frontier" met?

The correct answer is:

Slaves were sold in the South by owners in the border states.

The slave frontier´s expansion led to an increase in the slave trade. This western boundary passed through the middle of Georgia in 1790, and by 1830 it was stretching through Louisiana. By 1860 it was able to extend to Texas. This development in territory raised the number of slave states and the acquisition of land also presented an opportunity for planting crops that needed laborers.

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on

an earnest tone.

because portia wants to know why brutus has been acting strange lately.