Which of the following, if true, most strengthens the argument? A. The machinery that is now obsolete was used by a large number of manufacturing companies before it became obsolete. B. Among the people already holding jobs as technicians at Equip Corp, those who are most skillful at operating the new machinery had been some of the least skillful at operating the old machinery ( C. Most people applying for jobs as technicians today have much broader skills than did people applying for jobs as technicians 20 years ago. D. The skills required to operate and repair the obsolete machinery are useful in operating and maintaining many other types of machinery at EquipCorp that are not obsolete. E. Much of the machinery that EquipCorp now uses in manufacturing is very likely to become obsolete within the next 20 years.