The function $f(x)$ has a continuous second derivative, and it satisfies $f(4) = 8$, $f'(4) = -1$ and $f''(4) = 2$.

We can conclude that
A. $f(x)$ has a relative maximum at 4
B. $f(x)$ has neither a relative maximum nor a relative minimum at 4
C. $f(x)$ has a relative minimum at 4
D. We cannot determine if A, B, or C hold without more information.