Which sentence demonstrates correct comma usage? a. the news media including newspapers, news magazines, radio and television are an important source of information in this country. b. the news media, including newspapers, news magazines, radio and television, are an important source of information in this country. c. the news media, including, newspapers, news magazines, radio and television, are an important source of information in this country. d. the news media including, newspapers, news magazines, radio and television, are an important source of information in this country.

a. The news media including newspapers, news magazines, radio and television are an important source of information in this country.

Explanation:

Words of the same syntactic function are separated by commas if they do not come together by e, or and neither. And this was done correctly in letter A.

These words can be subject, predicate, adjunct adverbial and adnominal, noun, vocative, bet, etc. In the case of the phrase shown in letter A, the use of the comma was used correctly to separate the nouns "newspapers", "news magazines", "radio" and "television".

he believed if we do not fight back the britins would be in every household

the sentence that avoid faulty coordination is:

culture, which is well represented in philadelphia, plays a major role including theatre, music, and the visual arts.  

faulty coordination occurs when the writer gives equal importance two different ideas (clauses) which in fact are not equivalent. in order to correct a misplaced clause or idea, the writer can place less important or emphatic ideas in a relative clause as in the previous sentence.