The Qin dynasty was the first dynasty to start connecting the various walls into a greater whole. That happened around 221 to 206 BC and was done under the reign of Qin Shi Huang. Though the wall was later improved still by other dynasties, it was during the Qin dynasty that the Great Wall of China was first formed into a cohesive structure.
The Brezhnev Doctrine asserted that the Soviet Union would start becoming an important and interfering force in the Eastern part of Europe for one reason only - to preserve communist rule. A part this doctrine was also that they would want to obtain a disarmament agreement between themselves and NATO.
<h3>Slaves from different countries, tribes and cultures used singing as a way to communicate during the voyage. ... Music was a way for slaves to express their feelings whether it was sorrow, joy, inspiration or hope. Songs were passed down from generation to generation throughout slavery.</h3>
Tobacco plantations. This was correct on my test. Hope it helps
The last one, trust me every other answer here is so totally wrong.
