The Diameter of the Milky Way Is 100,000 Ly

Multiple Choice

The diameter of the Milky Way is 100,000 ly. This distance in SI units is

A) 5 x 10¹⁵ m.
B) 1 x 10²¹ m.
C) 4 x 10³⁰ m.
D) 3 x 10³⁶ m.
E) 2 x 10⁴² m.