Incident at Morales --- Dominique asks whether it is ethical to hire an engineer who has recently worked for a competitor, and Chuck replies that while employed as a contractor at Chemitoil, Fred was not required to sign a non-disclosure agreement. Select the best answer regarding an engineer's ethical obligations. A. In states with "right to work laws", engineers are under no obligation to protect proprietary information when changing employeers. B. Engineers are ethically free to use any and all knowledge gained in their employment when changing employers. C. Regardless of whether the engineer being hired signed a non-disclosure agreement or not, ethical issues are always a consideration. D. None of the above statements are applicable. E. As long as the engineer being hired did not sign a non-disclosure agreement, there are no ethical issues.