Hello!
There is an existing logarithmic property that states that [tex]log \frac{M}{N} [/tex] is equal to [tex]log M-logN[/tex].
Following that property, we can tell that [tex]log \frac{c}{9} [/tex] would be equal to [tex]log(c)-log(9) [/tex].
ANSWER: [tex]log(c)-log(9) [/tex] (third option)