The statements above, if true, most strongly support which of the following as a conclusion? A. The products manufactured by the companies are not undergoing design changes while the manufacturing jobs are being restructured. B. When assembly-line workers have made suggestions for improvements in manufacturing processes, some suggestions have been implemented, but many have not. C. Assembly-line workers now need increased reading and mathematical skills to do their jobs. D. Some of the innovations in assembly-line processes and procedures that were made to increase productivity have instead proved to be counterproductive. E. The manufacturing companies are increasing the average age of their assembly-line workforce while still seeking to increase production.