Which sample of fluorine gas F2 contains the greatest number of fluorine molecules? (multiple choice)

Let’s use the symbol ##N_A## where ##N_A## ##=## ##6.022xx10^23##.
A. there are approx. ##1/3N_A## INDIVIDUAL ##F_2## molecules.
B. there are approx ##1/12N_A## INDIVIDUAL ##F_2## molecules.
C. there are approx. ##1/19N_A## INDIVIDUAL ##F_2## molecules.
D. there are approx. ##1.9xxN_A## INDIVIDUAL ##F_2## molecules.
By using the symbol ##N_A## (where ##N_A## is Avogadro’s number) it is clear that option D is BY FAR THE MOST NUMEROUS.
Option A. was simply a number. To assess B I know that ##N_A## ##F_2## molecules has a volume of ##22.4*L##. To assess C I know that ##N_A## ##F_2## molecules has a mass of ##38## ##g## so in ##1.9## ##g## ##F_2## there are approx. ##1/19xxN_A## such molecules. But D. specifies approx. ##2N_A## ##F_2## miolecules.
So when we use Avogadro’s number as a NUMBER and indeed it is a number option D CLEARLY contains the most molecules.
I could have replaced the mole term with a dozen (because that’s the number is equivalent to!) and got nearly the same answer. If you are unconvinced with this treatment state your objections and we will try again. The point is that ##N_A## is simply a number that has the property that ##N_A## ##F_2## molecules has a mass of ##38.0## ##g##.