Write the next sentence in the following story.

How to spot an online scam 
Ask yourself: do they require you to pay money up front? 
If they are requiring any sort of up front payment to use their services, it is almost always a scam. Many of them will claim that it's for the cost of training, etc. Most of that is just lies.

Choices: a. More often than not, the scammer will take your money and run. Ask yourself: do they promise that you will become rich overnight? Let's face it.; b. They may also require you to pay them a fee to do the work of the scam. Start by taking note of the offer terms.; c. If you fail to pay them back, they won't actually use the services they have. Sometimes, scammers simply want to get their money from you to start their scam.; d. Do not discuss this with anyone else, unless you know for sure that it is indeed a scam. Determine whether you're being harassed.;. The answer should be
a.