Christianity took hold in kievan russia after a. the conversion of vladimir i. b. the arrival of greek missionaries. c. the viking traders shared the traditions. d. the conversion of yaroslav the wise.

The correct answer is a. the conversion of Vladimir I

After he returned from exile and reconquered the cities, he baptized himself in 988 and Christianize the entire nation making them all Orthodox Christians. He liked Christianity because he perceived it as a great religion after his emissaries traveled and described how various religions worked and how the people lived.