Renaissance
The age of enlightenment began in the 1650's, so it would need to be a continuation of an era that ended around the 1650's. Since the Renaissance lasted from 1350 - 1650, that makes it the most likely answer.
B. northern and southern China
Generally speaking, in a "unitary system" the <span>government is completely controlled by the national government, since this means that there is only a single control group, as opposed to a republic, where power is often shared between entities. </span>
Answer: An air battle above the English Channel to prepare for an invasion of Britain.
It was an aerial battle as the Germans sent their air force to drop bombs on Britain.
Many civilians lost their lives and various buildings were destroyed but thanks to the leadership of British Prime Minister Winston Churchill, the British people withstood the bombardment and the Royal Air Force fought back with U.S. support preventing Germany from conquering Britain.