Imagine this situation: you have bought a faulty item from a shop and you take {A. them; B. it; C. him} back to complain. You go directly to the shop assistant and tell them your problem. They say they cannot help you, {A. which; B. it; C. that}makes you angrier, to the point perhaps where you start insulting the poor shop assistant. RESULT: This will do you no {A. comments; B. interests; C. favours}, like getting any compensation, or even a refund. If you go directly to the first person you see within the organization you are complaining about, you may be wasting your time {A. as; B. if; C. when} they may be powerless to take any action or provide you {A. to; B. with; C. for} a solution. So the important lesson to be learnt is to make sure firstly that you are speaking to the relevant person, the one who has the authority to make decisions."