The extreme case of selectivity is the process of identifying and choosing a single most advantageous option among many possible alternatives. It involves making a decision based on carefully considered criteria, or factors, and ultimately executes the choice by taking action. This decision-making process requires much analytical and logical thinking, as well as a thorough evaluation of the options and potential outcomes.

When it comes to the extreme case of selectivity, there is no one-size-fits-all answer. It depends on the particular situation and its context. One may consider financial investments, political strategies, and even moral decisions when examining selectivity. For instance, in the case of financial investments, choosing the right investments may be the key to achieving better returns. In politics, effective decision-making can be the difference between success and failure. In ethical matters, the decision of what is right and wrong requires thoughtful contemplation.

To sum it up, the extreme case of selectivity is the process of making a decision after carefully considering the options and potential outcomes. This process requires skillful and analytical thinking, as well as a deep understanding of the context of the situation. Ultimately, it is up to the individual to determine which option is the most advantageous for their personal objectives.