I would say either A or C, but i'm not positive, my research didn't tell me much, sorry!
The option is b, I hope this helps you!
The Muscovite ruler was recognized as an emperor by Maximilian I, the emperor of the Holy Roman Empire in 1514. However, the first Russian ruler to be formally crowned as "tsar of all Russia" was Ivan IV<span>, until then known as </span>Grand Prince<span> of all Russia (1547)</span>
D . Both countries experienced political instability and constant
