Answer:
The correct answer would be B. poster session.
A poster presentation is an event of a conference in which research information is presented in the form of paper posters to be viewed by participants of the conference.
In a single event, numerous posters are presented through which various researchers illustrate their research methodology along with their results.
Thus, informal presentations of many different attempts to treat and prevent skin cancer are most likely to be observed in a poster session of the conference.
