James had the habit of exhausting his colleagues.

Answer: Option C

Exhausting : making one feel very tired; very tiring.
Deriding : the expression of contempt or ridicule.
Pushing : exert force on (someone or something) in order to move them away from oneself.
Praising : express warm approval or admiration of.
Supporting : bear all or part of the weight of; hold up.

Antonym of Exhausting is Praising