Answer:
The engineering ethical principles should be used to determine Elliot’s decisions on how to proceed are expressed in statement D - Engineers shall act for each employer or client as faithful agents or trustees.
Step-by-step explanation:
It is generally expected of an employee to be faithful to his/her employer. Therefore, Elliot should remain faithful to His company. Hence, statement D is applicable (Engineers shall act for each employer or client as faithful agents or trustees).
Thus, only statements D applies to the scenario described in the question - all the other statements are incorrect.