I would like to make up a few similar sentences.
(1) One of the challenges new immigrants face in this country is a (or the) language barrier.
(2) A (or The) language barrier is one of the challenges new immigrants face in this country.
(3) One of new immigrants' challenges in this country is a (or the) language barrier.
I would like to ask two questions.
(A) Do you say, "a language barrier" or "the language barrier"?
(B) Are these sentences grammatically correct?
Thank you very much for your help.