The end of the "cattle kingdoms" and the open range was caused by all of these except the civil war. Option A is correct.
The Cattle Boom kicked off primary with the Texas longhorn during the time when Spanish settlers in the 1700s brought their cattle to California as well asTexas. After that, the cattle were mixed with English breeds and resulted in the Texas longhorn
Answer: Prince Vladimir arranged mass baptisms in Kiev. :Princess Olga converted to Roman Catholicism and : Missionaries from Constantinople came to Russia.
The French Revolution was the first democratic revolution in Europe that actually gave birth to a stable democratic state. Foremost it is seen as the beginning of the democratization of Europe.