A Supernova That Occurs 10,000 Years from Now in a Galaxy

Multiple Choice

A supernova that occurs 10,000 years from now in a galaxy 50,000 light-years away:

A) will be observed on Earth 10,000 years from now.
B) was observed on Earth 40,000 years ago.
C) will be observed on Earth 40,000 years from now.
D) was observed on Earth 50,000 years ago.
E) will be observed on Earth 50,0000 years from now.