Question

which invention made plantations in the south more profitable than they had ever been?

○ barbed wire

○ steel plow

○ cotton gin

○ telegraph

Explanation:

To determine the invention that made Southern plantations more profitable, we analyze each option:

• Barbed wire was mainly for fencing, not plantation profitability.
• The steel plow improved farming in general but not specifically for Southern plantation cash crops.
• The cotton gin (invented by Eli Whitney) revolutionized cotton processing, making it faster and more profitable, which boosted Southern plantation economies reliant on cotton.
• The telegraph was for communication, not plantation productivity.

Answer:

C. cotton gin