15. The current Chancellor of Germany is Olaf Scholz (a) as of my knowledge cutoff in September 2021. Please note that political positions may have changed since then, so it's essential to verify the current Chancellor.
16. The event that is NOT directly related to the First Russia Crisis between Germany and the Russian Federation during the 2010s is the Chernobyl Disaster (a). The Russo-Georgian War (b), Ukrainian Euro Maidan Protests (c), and Pusssy Riot Protests (d) had more direct connections to the tensions between Germany and the Russian Federation during that period.