Which were causes of the US entry into World war 1 ? select all that apply.

a. Germany threatened to invade the United the Unites States?
b. Germany refused to trade with the United States.
c. The Zimmermann Telegram angered US leaders.
d. The sinking of the Lusitania killed American civillians.

Opposition to the nra came to a head in 1935, when the conservative supreme court declared the agency unconstitutional, claiming the nra gave the executive branch regulatory powers that belonged exclusively to congress. this decision began a series of court decisions that overturned key elements of the new deal.