help please math question​

Answer:
B
Step-by-step explanation:
To find the vertex of the parabola g(x), we expand (x+3)^2. So we get x^2+6x+9. Since the the x coordinate of the parabola is -b/2a, we plug it in. So we get -6/2 or -3. So x = -3 and y=0. So the answer is B. Shift down 3.