Rewrite the Given Expression as a Single Logarithm $\log _{5} 7-\log _{5} z$

Multiple Choice

Rewrite the given expression as a single logarithm. Assume that all variables are defined in such a way that variable expressions are positive and bases are positive numbers not equal to 1 .
- $\log _{5} 7-\log _{5} z$

A) $\log _{5}(7-z)$

B) $\log _{10} \frac{7}{z}$

C) $\log _{5} \frac{7}{z}$

D) $\log _{5} \frac{z}{7}$