It was most successful in Pax Romana. It was hard to maintain because of all the people and enemies.
The correct answer would be A
What gave them an advantage is economic prosperity due to rich soil and development of plantations based on slave labor. Many profit was accumulated from crops (tobacco) and also cotton. Later on in the 1800s when Eli Whitney created the cotton gin it created a boom in the slave industry and increased largely by 71%. After that the tool allowed mass production in textile industries.
B) tools seeds and supplies
The correct answer is D) Abbasid rulers became wealthy by controlling trade between East Asia and Europe.
The statement that describes the Abbasid Empire between the eighth and thirteenth centuries is "Abbasid rulers became wealthy by controlling trade between East Asia and Europe."
Trade relationships were facilitated by the fact that the Abbasid Empire controlled the Bagdhad territories when it seemed to be any signs of rebellion. although they experience so much turmoil.
The Abbasid Caliphate was founded by Abbas Ibn Abdul and established the capital city of the Empire in Bagdhad, in the region of what today is Iraq.