This is speculation, so please get a second opinion.
I think it's c, because the adults, in this passage, are teaching children how to behave, and therefore a and b are ruled out. d could have possibly been one, but I think that it would not be, because the adults are not explicitly setting clear examples for their children.
Again, you should get a second answer before you answer this.
1 a : did , stay
B : stayed, arrived, did not / didn’t like, left, rented, were
A : started, didn’t finish, loved
2 : took , did happen, went, wasnt, did you see, came, wasnt, did you have , knew
3. Did you have , was ,stayed, thought, didnt go, did you do, did you go, spent, spent, argued, bought, didnt buy
Answer: Outsourcing is more expensive it doesn't cut down on costs.
Explanation: :)