16. children are more likely to lose control and act out when they're

a. active.
b. content.
c. listless.
d. bored.

Children are more likely to lose control and act out when they're bored.

Explanation:

Children need constant guidance and programmed times, so when they have to face an unstructured time period they look for something to, other reason why is because they don't have full control over their reactions as an adult and they react purely to them, if you are bored you want to have fun and normally for kids losing control, acting out and misbehaving might be fun.

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.