PLEASE HELP NOW!!!
How does the graph of the function f(x + 3) compare to the graph of f(x)?
A.f(x + 3) has a vertical shift 3 units up from f(x).
B.f(x + 3) has a vertical shift 3 units down from f(x).
C.f(x + 3) has a horizontal shift 3 units to the right of f(x).
D.f(x + 3) has a horizontal shift 3 units to the left of f(x).