The answer is:
A. the Holocaust.
Anne Frank was a jewish girl that was hidden along with her family during the Holocaust and WWII in the atic of a house in Amsterdam, she was born in Frankfurt but in 1941 she lost nationality due to the actions taken by the Nazi party, she and her family hide in Amsterdam during German occupation of the netherlands while se was hidding she wrote in her diary the experience which was later turned into a book, she died in a concentration camp in 1945.
