In which of the following types of contracts is it most important for the contractor to maintain control of cost, schedule and scope changes?

Thank you for the invitation

 I agree with  answer C Firm Fixed Price

Thank you for your invitation. My answer is option C. firm fixed price.

Of course it is C - firm fixed price contract & thanks for the invite.

My answer is for option (C)

it is in C firm fixed price

(C) Fixed price (Lump sum) as he the contractor have all the risks of the contract on his side.

I would also go for option C.

C. Firm Fixed Price..............................................

Item C. Firm Fixed Price....

Option C. Firm Fixed Price

Firm fixed price, becuase the contracor takes the full responsibility of the subject work to complete within the agreed contract price, unless Client change the scope of work.