This U-shaped graph is concave up, soAf′′(x)=0f''(x) = 0f′′(x)=0Bf′′(x)<0f''(x) < 0f′′(x)<0Cf′(x)>0f'(x) > 0f′(x)>0Df′′(x)>0f''(x) > 0f′′(x)>0check_circleExplanationConcave up ⇔ f′′>0f'' > 0f′′>0.