Answer: A
Explanation: Byzantine Empire and the medieval society in Europe was the existence of a dominant religion which was Christianity. At the time of the rule of the Romans, Christianity was legalized by Emperor Constantine.
C. The increase in the use of coal as a source of heat and energy
Answer: Zhao Ziyang
Explanation: Give me the brainliest
Calhoun had resigned decided Vice Presidency to run for the Senate where he could more effectively defend nullification, Jackson signed into law the Tariff of 1832. This compromise tariff received the support of most northerners and half of the southerners in Congress.
