Thank you for the opportunity to help you with your question!
You have to know that studypool is a big scam, as a brillant tutor (you can see my answer's feedback), I have been scamed around 160 dollars... Don't trust this fucking shit and tell other people the same...
Anyway, and even I know I will not be paid, the right answer is FATS.
Please let me know if you need any clarification. I'm always happy to answer your questions.