Astronomy

Which of the following statements does not use the term light-year in an appropriate way?
A. A light-year is about 10 trillion kilometers.
B. It's about 4 light-years from here to Alpha Centauri.
C. The Milky Way Galaxy is about 100,000 light-years in diameter.
D. It will take the Voyager spacecraft about 20,000 years to travel just 1 lightyear.
E. It will take me light-years to complete this examination