Answer:
Option C. 3
Explanation:
we know that
The value of g(a) is the value of the function g(x) when the value of x is equal to a
If g(a)=0
That means that the value of the function g(x) is equal to zero when the value of x is equal to a (this is an x-intercept)
Looking at the graph
For x=3
The value of g(3)=0
therefore
The value of a is 3