What Provoked Whites in Money, Mississippi to Lynch Emmett Till

What provoked whites in Money, Mississippi to lynch Emmett Till?

A) It was a breach of social etiquette - the boy called a white woman "Baby."
B) Till raped a white woman.
C) Till was married to a white woman, and had several children in the North with her. When he and his family moved into the South, they were all lynched.
D) Till attempted to register to vote.