Which of the following is true about Jens Stoltenberg?

The correct answer highlights that Jens Stoltenberg has served as the head of NATO since 2014. This role is significant because NATO, or the North Atlantic Treaty Organization, is a prominent intergovernmental military alliance comprising many countries in Europe and North America. Stoltenberg's leadership has been marked by various challenges, including regional security issues, defense coordination among member nations, and responses to global threats.

His extensive experience in governance and international relations, having previously served as the Prime Minister of Norway, bolsters his effectiveness in navigating the complex geopolitical landscape in his role at NATO. This enduring position since 2014 signifies not only his contributions to transatlantic relations but also his influence in shaping NATO's strategic direction during a time of heightened global tensions.

The other choices present roles and positions that do not align with Stoltenberg's career. His connection to NATO is the most relevant and enduring aspect of his professional identity in the context of global security and diplomacy.