Which of the following actions would be characterized by contemning?

Contempt is the feeling or attitude that one has when they regard something as worthless or despicable. To contemn someone means to show disdain or scorn for them, essentially looking down upon them with a sense of superiority. Therefore, the action characterized by contemning is clearly represented by the act of looking down on someone with disdain. This aligns with the definition of contemning, which inherently involves a negative valuation of another person.

The other choices reflect positive actions or attitudes, such as admiration, encouragement, and celebration, which stand in stark contrast to the idea of disdain or contempt. Thus, they do not embody the essence of contemning.