Choose the answer that identifies the function of the infinitive or infinitive phrase in the sentence.

gina's goal is to do her best in everything
a. adjective
b. predicate nominative
c. subject
d. direct object

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.