Answer:
1.blaming Jewish people for economic problems
: Cause
2.the development of nuclear weapons
. Effect
3. increasing nationalism in Germany Cause
4.the death of millions of Jewish people: Effect
Explanation:
German nationalism had begun developing before World War 2. This was the main reason, many joined the Nazi party. So, option 3 is cause of World War II. Then, Hitler always had hatred towards Jews. He blamed them for the World War 1 and then for the economic condition of Germany. So, option 1 is the cause of World War II.
But, then around six million Jews were killed by Nazi's in brutal Holocaust, making option 4 as effect of World War II. Scientists developed nuclear weapons for the first time during the second World War. By the end of world war 2, U.S. used atomic bombs against Japan. So, development of nuclear weapons, option 2 is the effect of World War II.