Use the graph of y = f(x), assuming f"(x) 0 if x =f, to answer parts (A) through (F). Ay e X h g (A) Identify intervals on which the graph of f is concave upward. Choose the correct answer below. O A. (a,c);(c,d);(e,g) O B. (a,b);(e,g) O C. (b,c);(c,e);(g,h) O D. (a,b);(d,e);(g,h) O E. The graph is never concave upward. OF. (e,g) O G. (a,c);(c,e);(g,h) OH. (d,e);(g,h)