Determine where the given function is concave up and where it is concave down. 4 h (x) = x3 - 12x2+ 10x+50 O A. Concave up on ( - co, 3), concave down on (3, co) O B. Concave up on (3, co), concave down on ( - co, 3) O C. Concave down for all x O D. Concave up on ( - co, 0) and (3, co), concave down on (0, 3)