A) Explanation: After all the due diligence is carried out, before awarding contract to the best supplier, sometimes procurement professionals find themselves in some problem solving situation; this might have been emanated from supplier facing a financial challenge or problems from external environment. Responding to this might require an amendment or an addendum, depending on the case in hand. An amendment is for a physical change in the existing contract for example; if a contract contains a negotiated and agreed fixed price for the period of the contract but unexpected market forces such as an economic down turn or force majeure occur, the supplier may have to request an amendment order to continue to make a profit. An addendum is when an additional document is added to the existing contract for example, If a contract have a schedule of rates and the market forces prices up, an addendum can be added to an existing contract with a revised schedule. Once accepted, the addendum becomes part of the con-tract. Addendum are physically used when the forecasted cost of a project rises and approval is needed to increase the contract spend. * Refer to the question column for response