Bis one of my answers but i need one more to get it right

the growing power of the soviet union and communism influenced u. s. policies after world war ii. which are accurate statements regarding this?

a.
the united states began to deny citizenship to all immigrants from the soviet union.

b.
the united states began to build up its military and to stockpile weapons.

c.
the united states persecuted u. s. citizens.

d.
the united states amended the constitution to make communism illegal.