What did louisiana plantation owners most fear from the possibility of an end to slavery?

they were concerned about northerners taking over their plantations.

they were unaware of how to grow most crops and would be unable to grow them without slavery.

they would lose their wealth and way of life because they depended on the labor of slaves.

they thought that the freed slaves would become violent and take over the plantations.

The answer is *They would lose their wealth and way of life because they depended on the labor of slaves.

Explanation:

Unlike the trade and industry oriented north, the southern economy heavily relied on the plantation sector and the slavery that was driving it. Abolishing slavery threatened their life style and the way of life, along with the wealth they possessed.

c, they united with once

four sitting presidents have been assassinated while in office but the first was abraham lincoln,