The Type II Supernova That Created the Crab Nebula Was

The Type II supernova that created the Crab Nebula was seen by Chinese and Arab astronomers in the year 1054 CE..Assuming that the nebula is about 6,500 light-years from us, we know the star must have exploded approximately in the year

A) 554 CE.
B) 1054 CE.
C) 1054 BCE.
D) 5447 BCE.
E) 7555 BCE.