A Cleaning Company Rotates Its Staff to Different Floors on a Monthly

A cleaning company rotates its staff to different floors on a monthly basis. One crew member has a psychiatric disability. While his mental illness does not affect his ability to perform the various cleaning functions, it does make it difficult to adjust to alterations in his daily routine. The employee has had significant difficulty adjusting to the monthly changes in floor assignments. In view of this difficulty, the employer decides to allow him to stay on one floor permanently. This is an example of:

A) disparate treatment.
B) affirmative action.
C) hostile work environment.
D) retaliation.
E) reasonable accommodation.