Based on this passage, why was the Leo Frank case significant?

In 1913, Jewish factory manager Leo Frank was placed on trial and convicted of a serious crime with highly suspect evidence. Two years later, encouraged by anti-Jewish articles written in the Atlanta Constitution by Tom Watson, he was lynched by a mob.
A. Frank pushed for Jewish candidates to also be included in the white primary.
B. Frank was the first Jewish person to argue for African-American equality after Reconstruction.
C. It showed that prejudice in the South was also directed at Jewish people.
D. Frank was elected governor but denied office because of his Jewish heritage.

The correct answer is C. The Leo Frank case was significant because it showed that prejudice in the South was also directed at Jewish people. The case gained national attention and highlighted the issue of anti-Semitism in the United States.