Question #38 A concrete manufacturer is evaluating a hydraulic scale against a set of reference concrete samples. The scale measures weights to be 50 pounds lighter than their reference values. What does the hydraulic scale have a problem with? A) Bias; the scale readings are not accurate compared to the reference values. B) Bias; the scale readings change in bias over the range of weight values. C) Linearity; the scale readings are not accurate compared to the reference values. D) Linearity; the scale readings change in bias over the range of weight values