Which revision, if any, BEST improves meaning in the underlined portion in sentence 11?

(Leave as it is)

Explanation:

The other answers don't really make grammatical sense. They put commas in the wrong spots. They other answers don't improve on the meaning of the underlined portion.

answer: j

explanation:

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.