Context: Called Beating Cheating , it promised just what I was looking for : a way to find out FOR SURE if he was cheating or not , and to find out within 48 hours ! Having nothing to lose , and knowing I could get a refund within 8 weeks if it did n't work , I purchased the book online , downloaded it immediately , and got to work . And it worked like a charm .

Question: What is the reason that it " worked like a charm " ?
Options:
0. None of the above choices .
1. It was like a tasty bowl of Lucky Charms cereal .
2. It was like a talisman , rabbits foot .. and did n't do anything .
3. It worked and did exactly what it claimed to do , found my partner cheated within the time claimed .
Answer: 3