You invite me to dinner and agree to pay me an amount of money if I praise an invention of yours to another dinner guest who is interested in investing in your invention. I agree to attend, but I fail to show up, and the other guest decides not to invest in your invention. What is the main reason for the other guest's decision?
1) I did not attend the dinner
2) The other guest was not interested in investing
3) The other guest did not believe in your invention
4) The other guest found a better investment opportunity