First put the choices,and the answer is <span>(10^-3L/1mL)^3 is the correct answer.</span>
C. Distance from Earth
The observed brightness of a star (the apparent magnitude) to an absolute magnitude, you need to know the distance [d], to the star. Alternatively, if we know the distance and the apparent magnitude [m] of a star, we can calculate its absolute magnitude [d].
*paraphrased from "COSMOS.com"
An element cannot be broken down any further. Elements can be found on the periodic table