Answer:
Among the options given on the question the correct answer is option A.
Northern.
Explanation: The Great wall of China is one of the ancient piece of architecture which was built in the third century BC by the emperor Qin Shi Huang. The wall was made in the north of China and it was almost 13000 miles long and probably the longest in the world. Prevention of attack from northern side was the major goal of the emperor.
During that time the Inner or central Asian Nomads were the invaders of the China. Fear of this invaders was one of the main reason for building the wall. However the wall was not always able to protect China from the invasion.
Although the Great Wall was made in order to protect the China but it is a symbol of magnificent work of ancient architecture.
The Franks
A group of Germanic tribes. In the 8th century they established the Carolingian rule. Perhaps the most famous leader was Charlemagne.
Convents
a Christian community under monastic vow
Monasteries
a building or buildings occupied by a community of monks living under religious vows.
Estates-General
the legislative body in France until 1789, representing the three estates of the realm
Crusade
a medieval military expedition, one of a series made by Europeans to recover the Holy Land from the Muslims
The answer is B hoped it helps