The "blacklisting" that cost many film-industry workers their jobs in the late 1940's and early 1950's was due
to
a. the activities of HUAC
b. decisions by the Hollywood Ten.
c. demands made by the Loyalty Review Board.
d. these workers' efforts to promote communism over democracy.

the answer is

a u.s. citizen has to have lived in and been an american citizen for a year or more be for he or she can vote for presidential or country wide elections. they also have to register to vote. if the voting is for state representatives or issues, they have to have lived in that state for one month or more and meet the requirements for country wide elections.

i would say it is a and b.

hope this