Which of the following actions explains why britain officially entered world war ii?

the signing of the pact of steel between hitler and mussolini

the german invasion of the soviet union

the signing of german-soviet nonaggression pact

the german invasion of poland

unless they converted, many non-christians (mainly jews and muslims) were persecuted

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.