In paragraph 6, why does the author mention that "the Sun has many more atoms of any element, say iron, than does a meteorite specimen"? A. To show how difficult it is to compare the composition of a meteorite with that of the Sun B. To explain why a comparison of the compositions of a meteorite and of the Sun has to be done in terms of ratios of elements C. To identify the most common element in both the Sun and meteorite specimens D. To emphasize how much largerthe Sun is than any meteorite specimen is