German Anti-Semitism Was Based,to a Large Degree,on the Impression That

German anti-Semitism was based,to a large degree,on the impression that German Jews appeared to be wealthy bankers and jewelers.Why were numerous Jews bankers and jewelers?

A) Jews were genetically predisposed to be talented in those fields.
B) Jews concentrated on these professions because,historically,other jobs and opportunities were closed to them.
C) These were traditional "Jewish" occupations,as put forth in the Torah.
D) Most gentiles were not interested in such jobs.
E) There is no clear explanation.