What is the election criterion for nonpermanent members of the UN Security Council?

The correct answer is that ten members are elected for two-year terms. This criterion reflects the structure and function of the UN Security Council, which aims to ensure a rotating membership that can allow for diverse representation from various regions of the world. Nonpermanent members are selected through a voting process by the General Assembly, and the two-year term is designed to provide a balance between stability and the opportunity for different countries to participate in the Security Council's discussions and decision-making processes.

This rotation allows for fresh perspectives and ideas on global security issues while also maintaining continuity within the council's work. Moreover, nonpermanent members cannot serve consecutive terms, which further promotes the inclusion of a wide array of nations in these important deliberations.

The other options suggest different numbers of members or lengths of terms that do not align with the established rules of the United Nations, which explicitly states the election of ten nonpermanent members for two-year terms.