Section: Volume A
Explanation:
The contract change control system is part of the project's change control system. It addresses changes with the vendor that may affect the project contract. Change control system, a part of the configuration management system, is a collection of formal documented procedures that define how project deliverables and documentation will be controlled, changed, and approved.
Incorrect Answers:
B: The scope may change because of the stakeholder change request.
Vendor's relationship to the project, hence this choice is not the best answer.
C: The cost change control system manages changes to costs in the project.
D: There is no indication that the change could affect the project schedule.

Section: Volume B
Explanation:
A risk trigger is a warning sign or condition that a risk event is about to happen. Here the warning temperature is 450 degrees Fahrenheit, therefore it is referred as risk trigger.
Incorrect Answers:
A: Risk identification is the process of the identifying the risks. This process identifies the risk events that could affect the project adversely or would act as opportunity.
C: Here risk event is 500-degree temperature, as when machine reaches this temperature it should have to be shut-down for 48 hours, which in turn will laid a great impact on the working of project.
D: Risk response here is shutting off of machine when its temperature reaches 450 degree Fahrenheit, so as to prevent the occurring of risk event.

Section: Volume D