B, it was when the western pioneers moved east to discover new land to grow crops and make population XD
It gave them more jobs but less money.
Answer:
A siege is a military's tactics that's carried out by surrounding the enemy's town with our own forces.
This tactic Brought Victory for American soldiers during our battle for Revolution against British army in Yorktown. In 1781, American colonists mobilized around 9,000 soldiers to surround Yorktown that occupied by the British soldiers.
This siege cut off every potential path that Yorktown soldiers usually used to receive their food supplies. In the end, the food supplies inside Yorktown started to gradually diminished and the leaders of Yorktown decided to surrender.