66.

After awarding contract to one of the sellers, you realize you have missed a clause for the delay in the contract and want to modify it. how should you proceed further ?

A ) Contract is legally binding and cannot be changed once signed

b ) Project manager should inform the seller about the change in the next meeting

c ) project manager should inform the seller about the change though a formal written communication

d ) project manager should proceed with contract change control system at his end

what do you think it is and why ?