Which of the following could replace 'subordinates' as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.

Globalisation has affected almost every aspect of human life in this century, but the most obvious and observable effect is in the corporate environment. Here comes the importance of the modern business executive who has the requisite manners, decency and propriety to project a positive image of self and that of his company. An executive should not feel out of place in any way. Then there are work place etiquettes, letter writing and telephone manners which are very essential to create a good impression.
The unwritten rule is that seniors should be considerate, accommodative and should delegate work fairly while subordinates should treat their superiors with respect.