Find the open intervals where the function f(x) = In (x + 16) is concave upward or concave downward. Find any inflection points. . . . .. Select the correct choice below and, if necessary, fill in the answer box within your choice. O A. The function has a point of inflection at (Type an ordered pair. Type an exact answer in simplified form. Use a comma to separate answers as needed.) O B. The function does not have an inflection point. Select the correct choice below and, if necessary, fill in the answer box within your choice. O A. The function is concave upward on the interval(s) (Type your answer in interval notation. Type an exact answer in simplified form. Use a comma to separate answers as needed.) O B. The function is never concave upward. Select the correct choice below and, if necessary, fill in the answer box within your choice. O A. The function is concave downward on the interval(s) (Type your answer in interval notation. Type an exact answer in simplified form. Use a comma to separate answers as needed.) O B. The function is never concave downward