There were a few questions that confused me on the exam and I was hoping you could answer. I appreciate the input!

1) If there is alot of uncertainty in the scope of the project then what type of contract should you use?

I believe the answer here is either Time and Material or is it Cost Reimb, which one is the better option?

2) What if the question is reworded to say if the scope is very certain which type of contract?

I would think the answer is FFP but is that always the case regardless of if you are the seller or the buyer