Answer:
Principal
Explanation:
Important point to notice here is age of Mrs. Dey as she already had a an experience of 30 years so she must somewhere around late fifties or early sixties.
The principal violated the standard because he does not entertain the possibility of Mrs. Dey taking a new position because of her age. As he clearly mentions that he thinks she would be a better fit staying in her same position until she reaches her retirement age in a few years