This is a composite. Another way to write them is f(g(x)). Take the function g(x) and stick it in for x in f(x). Like this: [tex]f(g(x))= \frac{(3x+1)-1}{3} [/tex]. But we aren't done cuz there's some simplifying there to do. [tex]f(g(x))= \frac{3x}{3} [/tex] and canceling out the 3's we get just a simple x as our answer. The choice is the last one above as your answer.
