1 thats what i got on my test
it's number d.
because Americans immunity system wasn't strong as for that of the Europeans
I hope it helps ;D
Answer: The Cold War began after the surrender of Nazi Germany in 1945, when the uneasy alliance between the United States and Great Britain on the one hand and the Soviet Union on the other started to fall apart. ... The Americans and the British worried that Soviet domination in eastern Europe might be permanent.
Explanation:
No, no U.S. state has this prerogative. The rules for acquisition of United States citizenship are set out in the Immigration and Nationality Act of 1952, which is a uniform legislation as required by the constitution, which determines in its Article I, section 8, clause 4 that Congress shall have power "To establish a uniform Rule of Naturalization."