Said to be the same type of stimulus to the Texas Revolution that the Stamp Act was to the American Revolution, was initiated by Lucas Alamán y Escalada, Mexican minister of foreign relations, and was designed to stop the flood of immigration from the United States to Texas. The law came as a result of the warning and communications of Manuel de Mier y Terán, who made fourteen recommendations directed toward stimulating counter-colonization of Texas by Mexicans and Europeans, encouraging military occupation, and stimulating coastal trade.
You can search on google it helps
The correct answer is currency which is letter b. This is the first development of Aksumites without having any pressure from the outside culture as their currency was coinage produced and were used to their Kingdom which held a great significance.