Which answer represents the range of the logarithmic function given below? f(x) = log7 x
a. x> =0
b. x< 0
c. x> 0
d. all real numbers

For your info, the answers A, B, C, D represents the DOMAIN and not te RANGE. However find here below the DOMAIN & te RANGE

f(x) = log₇(x). Whatever is the base, the domain is x>0 and the ASYMPTOTE
is x=0. Hence the DOMAIN is x>0 (answer C)
Regarding the range their is no limitation and the range is:
 -∞ <y< +∞
or
Range = {y / y ∈ R}