Why did germans put numbers on jews

Was the us justified in using the atomic bomb on hiroshima and nagasaki? why or why not?

All of the following changes typically happened in colonies as a result of imperialism, except: a. cultural practices were outlawed. b. they became more economically self-sufficient. c. european nations built modern infrastructure, including railways. d. the european language became the language of government and education.

Can someone me out with this , i'm putting 30 points on it