I am sorry if I am wrong but i think it my be A.
Answer:
Speciality is a pursuit, area of study, or skill to which someone has devoted much time and effort and in which they are expert
Answer: Each of these religions is monotheistic anf believes in only one god.
Well, Rasputin was killed due to him over ruling the Russian empire. The Duchess had cherished Rasputin and not so soon after the Duchess and Rasputin where going through was found out 16 days after the death.