The answer is that they resisted by 'arming themselves' and fighting back the Nazi's.
The correct option is "-by arming themselves"
The Jewish resistance during the Holocaust was a resistance movement of the Jews against Nazi Germany during the Second World War. Due to the careful organization and overwhelming military might of the Nazism of the German state and its supporters, many Jews were unable to resist the murders. However, there were many cases of attempted resistance in one form or another, and more than a hundred armed Jewish uprisings. At the beginning of the occupation, the Jews thought that by submitting to German laws and ordinances, they would avoid the worst. To accept their exclusion from many professions in the West, they wore a distinctive sign (bracelet or a yellow star), concentration in the ghettos, forced labor in the companies that supplied the German army, etc. Those who had certificates of "economically useful Jews" had long believed that would protect them from the risk of arrest and deportation.
From the beginning of the occupation, the Jews had to fight a daily struggle to survive. Most of the passive resistance comes from everyday acts and even from acquired habits. The greatest part of life in the ghetto was cultural and spiritual resistance, as evidenced, for example, by the establishment of clandestine schools and respect for religious obligations.
can you post options?