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Question:

Your project includes a new manufacturing technique that requires knowledge of chemical engineering to perform one of the services required in the project management plan. The service was performed, and as a result, an approved change request has been submitted. Which of the following statements is correct?  

A Approved change requests are inputs to the Direct and Manage Project Work process, and the Direct and Manage Project Work process will be repeated in order to implement this change. 
Explaination

Approved change requests are an input to the Direct and Manage Project Work process. This process will be repeated to implement the change. Approved change requests come about as a result of the approved change requests output of the Perform Integrated Change Control process. There is not enough information in the question to determine whether the scope has increased, so the other answers are incorrect.