Calculus really quick check

The graph of f ′(x) is continuous and decreasing with an x-intercept at x = 2. Which of the following statements must be true?
Edit
The graph of f has an inflection point at x = 2.

The graph of f has a relative maximum at x = 2.

The graph of f is always concave down. MY ANSWER*******

The graph of f is always increasing

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