The event that led to the Nazi roundup of Jews known was D. The shooting of a German ambassador by a Jewish person in France.
In 1938, German ambassador, Ernst vom Rath was assassinated by a Polish Jew known as Herschel Grynszpan.
As a result, the Nazis - who had been looking for an excuse to act against the Jews - began to round up and murder Jews as well as destroy their property.
Find out more on the Kristallnacht at https://brainly.com/question/70815.
#SPJ2