In a(n) _____, assessment center participants may be asked to give a five-minute talk on why their company should expand its market to a particular Eastern Europe country. They must defend their selection to the rest of the members of a group. Participants are rated on their selling abilities, self-confidence, aggressiveness, and oral communication skills.

A) in-basket exercise
B) leaderless group discussion
C) unstructured business simulation
D) knowledge application test
E) leadership development exercise

The scenario describes a leaderless group discussion, where participants are given a topic and must effectively communicate their ideas and persuade others in the group. They are evaluated on their communication and leadership skills, but there is no specific structure or correct answer to the discussion. The other options such as in-basket exercise, unstructured business simulation, and knowledge application test involve more specific tasks or scenarios with a clear objective or correct answers, which is not the case in this scenario. The leadership development exercise may involve similar communication and persuasion skills, but the scenario does not specifically mention any developmental aspect of the assessment center activity.