Question 185441
"log rules" say:
log a - log b = log a/b
.
Therefore,
log (x+10)-log x
= log ((x+10)/x)
.
It looks like of the choice given
b) log x+10/x
is the closest 
However, because of the the "order of precedence" it does NOT equal:
log ((x+10)/x)
.
I would say your answer is:
c) none of these