Why hasn't my house sold?

I am sure as real estate agent and brokers this is a call we frequently receive. How do you answer this question?

1) The price is too high ( this may be the real answer)

2) It will sell - it just takes time ( this is probably not true. In many areas, prices are not rising. Waiting does not help)

3) Let's clean some more and declutter some more and have the house stager come in for a fresh new look. ( This may actually sell the house)

4) I will do more open houses, call more agents, send flyers and postcards.( This may help too as exposure is the key to selling a home.)