Answer:
c. prevented supplies from entering or leaving.
Explanation:
The siege of Vicksburg was a military campaign that took place during the American Civil War. In this campaign, the Union Army was able to prevent supplies from entering or leaving Vicksburg. This was the last major Confederate stronghold on the Mississippi River, and by capturing it, General Ulysses S. Grant was able to fulfill what was known as the Anaconda Plan.
Answer: Increase, decrease
Explanation: positive reinforcement increases the likelihood of a behavior being repeated. Negative reinforcement decreases the likelihood of a behavior being repeated.
Hoped that helped.
