The most powerful medieval pope was

The most powerful medieval pope was Pope Innocent III. He "reigned" for 18 years, during the end of the 12th century until the beginning of the 13th century - 1246 when he died. He was very powerful during this time, and had a strong influence even over kings whose countries practiced Catholicism. which is basically all of Europe. He was also the one who started the Crusades to fight Muslims.

C) germany is the anwser

White dwarf is very hot, but also very small and that is why it may appear dim.