Answer:
The capital city in the Tang dynasty was Chang'an, a huge trading center, with a population of more than 1 million. The capital city in the Song dynasty was Kaifeng, had just about 1 million people.
Explanation:
I don't think that they have yet.
Answer:
A
Explanation:
That was the original intention of OPEC when it was founded in 1960.
However it has used oil as a political leverage, for example after the Yom Kippur war in 1973, to get greater Western support for the Palestinians.
