C. He was injured and had to return back to England to recover he had sustained an injury from a gunpowder explosion
IT was estimated about 800,000 Vietnam .
The correct answers are<em> (A): Prince Vladimir arranged mass baptisms in Kiev. (B):Princess Olga converted to Roman Catholicism </em>and <em>(E): Missionaries from Constantinople came to Russia.</em>
Christianity was introduced into the East Slavic state of Kievan Rus (Russia) by Greek missionaries from Constantinople come to Russia during the 9th century. In 957 princess Olga of Kiev converted to Christianity when the Constantinople missionaries baptized her. Olga's grandson Vladimir, the prince of Kiev, was then Baptized in 988, he as well arranged a mass baptism for his residents at river Dnieper. Thus this became the iconic event that led to Christianization of Kiev as well as evolution of the church of Russia.
I believe it was called Pioneer 10 which was an american space probe.