1. Shopping scam is when a group of people (scammers) pretend to be reliable sellers , they either put the products in different prices or promises something else in return.
2. The warning could be that the price of the products are different from others places for example if you have seen that product somewhere else and the price is nothing the same as that site you should realize what’s happening. Also if the online store for example ask you for unusual pay methods.
3. Something you could do is read the reviews if it contains, check the privacy policy and the information of the website check if it has enough information about the contributors and site in general.
4. You should report the scam, talk to your bank and see what can be done and after that secure your accounts change(reset) passwords.
Hope it helps:)
I'm not 100% sure but I think it is A. Sorry if it is wrong.
