The answers should be B and C, because they worshiped Yahweh, a monotheistic God. They also experienced many periods of captivity under Babylon and Persia.
Although they were considered themselves one culture yet divided politically, I would not describe them as city-states, more like tribes. This is why the answer is not A.
Their art focused more on gold or silver structures that showed reverence toward their God, not focusing on the human body. This is why the answer is not D.
Answer:
The govt of the Tang and Song constructed the Grand Canal which improved the transportation of goods and people. They also introduced a money economy. The creation of paper money by the Song dynasty made trade even more important.
Fluid is a is just another word for liquid. For example water, power aid, cool aid, etc.